This procedure is for installing the 2-Port Gigabit Ethernet module in the Terabit Switch Router (TSR®).
Before beginning this procedure, carefully inspect the package to ensure no damage occurred during shipping or delivery. If you suspect any possible damage, contact Customer Service immediately. For easy and quick reference, this FRP is organized as follows:
Support Services Tools Overview TSR Bay, Shelf, and Module Numbering Populating the Bay Transceiver Offerings Preparing to Install Modules Removing a Router Module Removing Filler Modules LEDs Configuring the 2-Port Gigabit Ethernet Module Configuring the Interfaces Support Services
There are three ways to obtain information on customer service and training:
- Phone:
United States Support: 877-292-8424 (TSR-BY-AVICI)
International Support: 01-978-964-2350
- E-mail: support@avici.com
- World Wide Web: http://www.avici.com
Tools
- 1/2 in. flat blade screwdriver (if removing filler modules)
- 3/8 in. flat blade screwdriver (if installing a SAM module)
Overview
The 2-port Gigabit Ethernet module attaches to the TSR® via optical multi-mode short reach (1GigE 2P-SX) Printed Circuit Board (PCB) or multi-mode/single-mode long reach (1GigE 2P-LX) PCB. '
NOTE The 2-Port Gigabit Ethernet is a Family 1 module.
To visually identify this module, please refer to the faceplate label. The 2-Port Gigabit Ethernet module can be identified by either 1GigE 2P-SX for the short reach version or 1GigE 2P-LX for the long reach version.
TSR Bay, Shelf, and Module Numbering
Each TSR bay has four shelves numbered from 1 (top) to 4 (bottom). Each shelf has 10 slots to house the router and server modules.
Bay Numbering
Bay numbering for the TSR is as follows: all bays will be numbered odd in the first row; for example: 1, 3, 5, and even in the second row; for example: 2, 4, 6. This numbering system is more logical for a larger scale system typically found in a POP (with odd first row and even second row.) Refer to Figure 1.
Figure 1. TSR Bay Numbering
The four shelves and the router module numbering is as follows:
Figure 2. TSR Bay Shelf and Slot Numbering
Populating the Bay
The location of the routing modules within the bay creates the TSR system's "toroidal mesh." It is critical to install routing modules and server modules in predefined positions. All router modules must be inserted in pairs.
The rules for populating the first TSR Full Bay and TSR Split Bay with router module pairs follow.
- The server modules are restricted to slots 11 and 31 in Full Bay configurations. In the Split Bay configuration, server modules are restricted to slots 11 and 20 for the upper router and in slots 31 and 40 of the lower router.
- Modules occupying a slot use the slot number as its identifier. In a multibay system, a module is identified by bay number/slot number; i.e., 1/10 would be bay 1, slot 10.
- Slots with red circles only accept modules with red circles. Slots with blue squares only accept modules with blue squares.
- The 2-Port Gigabit Ethernet is a Family 1 module.
- Router modules must be added in Family pairs. That is, you must install two Family 1 modules OR two Family 2 modules.
- If installing the module in a cold bay, follow the Population Rules outlined in the Terabit Switch Router Install Guide.
- If installing the router module in a live bay use the show population CLI command - specifying the module family - to identify the slot(s) to populate. Module color is represented in the CLI as R for red and B for blue.
Refer to Ipriori CLI Reference and Configuration Guides (Vol. 1) for further information on this command. Online versions of the manuals are available at http://www.avici.com/documentation.
Transceiver Offerings
The 2-Port Gigabit Ethernet module includes two transceiver offerings: SX and LX. See Table 1. The SX transceiver supports only Multi-mode Fiber (MMF) including both 62.5/125 µm and 50/125 µm diameters. The LX transceiver supports both MMF and single-mode fiber (9/125 µm) and requires an external mode conditioning cable for Gigabit Ethernet applications.
Preparing to Install Modules
This section describes the procedure to prevent damage to the TSR system from static electricity.
Use these precautions to prevent damage from static electricity:
- Do not handle modules unless you are using the appropriate antistatic protection, such as an antistatic wrist or heel strap and a conductive mat.
- When using an antistatic wrist strap, attach the cord to the appropriate ground jack.
- Handle modules by the faceplate and outer enclosure only. Do not touch electrical connections, pins, or soldered surfaces.
CAUTION Risk of electrostatic damage. When handling circuit cards, wear a grounded antistatic wrist strap or equivalent protection to avoid damaging electrostatic parts.
Installing the Antistatic Wrist Strap
A grounded antistatic wrist strap must be used to protect the TSR system modules and components from damage caused by static.
PROCEDURE: Use the following procedure to install the antistatic wrist strap:
Step 1 Remove the alligator clip from the grounding pin on the antistatic wrist strap.
Step 2 Insert the grounding pin into the electrostatic discharge (ESD) jack on the front of the TSR bay shelf. Refer to Figure 3.
Step 3 Use the ESD jack while handling modules.
Figure 3. ESD Jack Location
Removing a Router Module
If you are removing a router module, use the following instructions. If you are removing a filler module, refer to "Removing Filler Modules" .
Before removing a module you must shut down the module being replaced. Use the shutdown command to disable all functions on the module. The module appears as administratively down when executing the show mod brief command.
Shutting Down the Module
To notify the system to shutdown a module, use the CLI command line to turn off the respective slot. Using the shutdown command allows the removal of the module without service interruption.
Example: Use the shutdown command to disable all functions on the module. The module appears as administratively down when executing the show mod brief command.
router(config)#module 1/5/1
router(config-if)#shutdown
router(config-if)#end
router#
router#show module brief
Module Discovered Configured Last Started State
1/1 1xOC192c 1xOC192c MON DEC 17 10:40:07 2003 Up
1/2 2x1GBE 2x1GbE MON SEP 2 10:40:07 2002 Up
.
.
1/5 1xOC48c 1xOC48c MON SEP 2 10:40:08 2002 Down
1/6 1xOC12c 1xOC12c MON SEP 2 10:39:57 2002 Up
1/3 4xOC12c 4xOC12c MON SEP 2 10:40:07 2002 Up
router#
When the module is shutdown, proceed with removing the router module.
Routine router module removal requires the disconnecting of existing fiber optic cable connections. Router modules serving as Server Attached Modules (SAMs) require disconnecting fiber optic and Ethernet cable connections to the server module.
CAUTION (1) When handling router modules, wear a grounded wrist strap or equivalent antistatic protection to prevent damage to electronic parts.
PROCEDURE: Use the following steps to remove the router module(s):
Step 1 Verify that the antistatic wrist strap you are wearing is properly grounded.
Step 2 Open the pull tab on the center cable tray and gently pull the center cable tray out of the router (refer to Figure 4 and Figure 5).
WARNING (1) This is a Class 1 laser product. Invisible laser radiation can be emitted from the aperture of the port when the fiber cable is disconnected. Avoid exposure to laser radiation and do not look directly into open apertures.
Figure 4. Router Module Faceplate
Step 3 Disconnect the lower fiber optic cables from the fiber cable adapters (SC) on the center cable tray. Move the cables to one side to ensure that they do not interfere with removal of the router module (refer to Figure 5).
Figure 5. Router Module Cable Connections
Step 4 Gently push the center cable tray back into the router module and close the cable tray pull tab. If necessary, repeat Step 2 through Step 3 for fiber optic cable connections in the right cable tray.
- If the module is a SAM, proceed to Step 5, if not then skip to Step 6.
Step 5 Open the cable tray pull tab on the faceplate of the router module tray marked "AUX." Gently pull the cable tray partially out of the module until detent clicks (refer to Figure 6).
WARNING (2) This is a Class 1 laser product. Invisible laser radiation can be emitted from the port aperture when the fiber cable is disconnected. Avoid exposure to laser radiation and do not look directly into open apertures
Step 6 Open the pull tab on the center cable tray and gently pull the cable tray out of the router until detent clicks (refer to Figure 6).
Figure 6. Ethernet Cable Connection
Step 7 Disconnect and undress the RJ-45 Ethernet cable from the Ethernet port on the tray marked "AUX" (refer Figure 6).
Step 8 Hang the Ethernet cable down and out of the way, or tuck the cable into the horizontal cable tray under the module shelf.
Step 9 Gently push all cable trays to the closed position and close the cable tray pull tabs.
Step 10 To unlock the ejector latches, simultaneously slide the release levers in the direction of the arrows (see Figure 7).
Figure 7. Router Module Removal
Step 11 To release the module from the backplane, simultaneously rotate the ejector latches to a fully open position and carefully pull the router out a few inches out of the shelf (see Figure 7).
CAUTION (2) When the ejector latch release lever is in the open position, do not use the latch lever to remove the module or adjust the module in the card guides. Failure to adhere to these guidelines may result in equipment damage.
Step 12 Hold module in place with one hand at the bottom of case, then close the ejector latches by rotating them to the closed position and sliding the release levers in the direction of the arrows to lock the levers back into place.
NOTE Do not rest the module on the cable trays during inspection. This could result in the breaking of the pull tabs on the cable tray drawers (refer to Figure 8).
Step 13 To remove the module, grasp it on the top and bottom and pull it carefully out of the shelf.
NOTE A detailed inspection of the VHDM connector is required each time a module is removed or inserted. Lay the module gently on its side to perform a VHDM inspection.
Figure 8. Cable Tray Pull Tab
CAUTION (3) Any contact to a VHDM connector outside a TSR could damage the connector.
Step 14 Carefully inspect the VHDM connector for damage such as deformed sockets, holes between socket columns, and deformed guide fins on top and bottom of the socket columns.
Figure 9. VHDM Connector
.
NOTE If the VHDM connector has any signs of damage, DO NOT insert it into a TSR. Mark the module and slot as damaged and call TSR-BY-AVICI to request a Return Material Authorization (RMA).
Step 15 Before placing the module in a static-proof bag, replace the VHDM protective cap over the VHDM connector at the rear of the module. This will protect the pins while the module is not in the TSR. Refer to Figure 13. Repackage according to RMA directions. Ship back to Avici.
CAUTION (4) Within five minutes of removal of a module, a replacement module or filler module must be installed in the empty slot to ensure proper air flow within the system.
Removing Filler Modules
The TSR system ships with 36 filler modules, which ensures proper cooling and elimination of electromagnetic interference during operation. Remove filler modules from slots intended for router modules (see Figure 10).
Figure 10. Filler Module
PROCEDURE: Use the following procedure to remove a filler module:
Step 1 Use a 1/2-in. flat-blade screw driver to loosen the lock latch on the filler module.
Step 2 Pull the filler module out of the slot (see Figure 11).
Step 3 Store the filler module in a dry, cool area.
Figure 11. Removing Filler Modules
Figure 12. Filler Module
Installing the 2-Port Gigabit Ethernet Module
Install the 2-Port Gigabit Ethernet module after removing the filler module. Gigabit Ethernet modules must be installed in an assigned slot location. See "TSR Bay, Shelf, and Module Numbering"
NOTE When the ejector latch release lever is in the open position, do not use the lever to lift or adjust the module in the card guide.
PROCEDURE: Use the following procedure to install 2-Port Gigabit Ethernet modules:
Step 1 Remove the 2-Port Gigabit Ethernet from its static protection packaging.
Step 2 Before inserting the module, remove the VHDM protective cap from the end of the module before use. Set the protective cap aside in a safe place (see Figure 13).
Figure 13. Remove VHDM Protective Cap Before Use
NOTE A detailed inspection of the VHDM connector is required prior to insertion. Lay the module gently on its side so you can perform a VHDM connector inspection.
NOTE Do not rest the module on the cable trays during inspection. This could result in the breaking of the pull tabs on the cable tray drawers. Refer to Figure 14.
Figure 14. Cable Tray Pull Tabs
Step 3 Carefully inspect the VHDM connector for damage such as deformed sockets, holes between socket columns, and deformed guide fins on top and bottom of the socket columns
Figure 15. VHDM Connector
NOTE If the VHDM connector has any signs of damage, DO NOT insert it into a TSR. Mark the module as damaged and call TSR-BY-AVICI to request an RMA.
Step 4 Check the color indicator on the top of the module to determine if it is the right type for this slot (red circle or blue square). If it is not the correct color and there is no other slot of that color expecting a module of this type, contact Avici Customer Service.
Step 5 Ensure that the cable trays on the router module being inserted and on the adjacent router modules are fully closed.
Step 6 Ensure that all bay cabling is clear for module insertion.
Step 7 Close the ejectors latches completely by sliding the release levers in the direction of the arrows and locking into place (see Figure 16).
Figure 16. Router Module Installation
Step 8 Align the module with the card guides and slide the module into the slot until the ejector latch's release lever tab hits the outer lip of the shelf (see Figure 17 and Figure 18).
Figure 17. Router Module Insertion -1
CAUTION (5) When the ejector latch is in the open position, do not use the lever to lift or adjust the module in the card guide. Failure to adhere to these guidelines may result in equipment damage.
Step 9 Simultaneously slide the release levers in the direction of the arrows and rotate the ejector latches to the open position (see Figure 18 and Figure 19).
Figure 18. Router Module Insertion - 2
Figure 19. Router Module Insertion - 3
Step 10 Slide the module in until the ejector latch tab slides into position behind the outer lip of the shelf (see Figure 20).
NOTE Do not push the module too far into the slot. The ejector latch tabs must not extend beyond the groove that forms the outer lip of the shelf.
Figure 20. Router Module Insertion - 4
Step 11 Simultaneously depress the release levers on the top and bottom ejector latches and rotate the ejector latch to the closed position (see Figure 20 and Figure 21). Release the release levers once the ejector latches are closed.
NOTE If the ejector latches will not close, reseat the module by pulling it six inches out of the slot and then repeating Step 7 through Step 11, making sure the module is not inserted too far into the slot. If the ejector latches still do not close after reseating the module, contact Avici Customer Support.
Figure 21. Router Module Insertion - 5
NOTE The 2-Port Gigabit Ethernet module uses existing I/O RJ-45 and fiber optic cables. Unlike the OC-48, the 2-Port Gigabit Ethernet module only uses the right most (3-4) tray for cabling, instead of the center tray.
Step 12 Open the cable tray pull tab on the faceplate of the router module tray marked "AUX." Gently pull the cable tray partially out of the module until the detent clicks (see Figure 22).
Figure 22. Connecting the Ethernet Cable
Step 13 Open the pull tab on the right most cable tray (3-4) and gently pull the cable tray out of the router until detent clicks (see Figure 23).
Step 14 Connect and route the RJ-45 Ethernet cable from the Ethernet port on the tray marked "AUX." using the cable management system.
Step 15 Gently push the cable tray marked "AUX" to the closed position and close the cable tray pull tabs.
NOTE Take care to route the cables using the cable management system to avoid damaging the cables when closing the drawers.
Step 16 Connect the fiber optic cables to the fiber cable adapters (SC) on the right most cable tray. Refer to Figure 23.
Figure 23. Installing Fiber Optics
NOTE Take care to route the cables using the cable management system to avoid damaging the cables when closing the drawers.
Step 17 Gently push the right most cable tray back into the router module and close the cable tray pull tabs.
LEDs
The 2-Port Gigabit Ethernet module supports six LEDs.
Board Status
The two top (existing) LEDs indicate "up" status of the board. During routing module POST, the red LED on the faceplate lights and remains lit until POST is completed. After completion of POST, the green LED lights and the red LED is extinguished.
The solid green LED indicates that the module has passed POST.
If the red LED remains lit, POST has detected a nonrecoverable error or fault. If the red LED remains lit, remove and reseat the module to run POST again.
Port Status
The four bottom bi-color (green/orange) LEDs, indicate port status. These bottom LEDs consist of two pairs of LEDs, the left most LED indicates port status and the right most LED indicates activity status, one set per port.
When the port is up, the left most LED will be solid green. If no light is present, the port is down.
When the port is receiving data, the right most activity LED will be blinking orange, indicating activity. If there is no light, then it is not active (see Figure 24).
Figure 24. Gigabit Ethernet Module LEDs
Configuring the 2-Port Gigabit Ethernet Module
Introduction
The TSR Gigabit Ethernet interface interconnects to other Gigabit Ethernet compliant devices. Support for the following IEEE 802 standards is available:
- Full duplex mode
- Auto negotiation
- Flow control
Address Resolution Protocol (ARP) processing is available for the conversion of internetwork addresses to physical addresses hard coded in the network interface hardware. ARP support includes:
- Recognition of multiple MAC layer end points per IETF RFC 826
- Ability to clear individual ARP entries from the cache
- Ability to flush the cache on a per interface, module, or TSR basis
- Ability to globally define ARP cache entry timeout
- Ability to display ARP entries
- Ability to define a static binding
To configure a 2-port Gigabit Ethernet module, activate the installed module and configure the interface as described in the following sections.
Activating a 2-Port Gigabit Ethernet Module
PROCEDURE: Use the following steps to configure and activate a module.
Step 1 Use the module command with the 2x1gbe keyword to identify the 2-port Gigabit Ethernet module installed in the slot.
Step 2 Use the boot command to specify which image the module loads.
Step 3 Use the no shutdown command to activate the module.
Example: In the following example:
- The module command assigns a 2-port Gigabit Ethernet module to bay 1, slot 35.
- The boot command boots the module using the image stored in the second (2) location in flash memory.
- The no shutdown command enables the module.
- The show modules command displays the new configuration:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#module 1/35 2x1gbe
router(config-module)#boot 2
router(config-module)#no shutdown
router(config-module)#end
router#show modules
MODULE 1/35:
Discovered (2x1GbE) 2 Port Gigabit Ethernet MPLS-Capable
Configured (2x1GbE) 2 Port Gigabit Ethernet
Physical port type is multi mode fiber
Hardware is 2x1GbE, Version 1.0, Revision 11
Fabric version is 2.0
Software version: Platform: cm-d; Label: R4_2
Built on May 29 2001, 12:37:44
ROM Version: IPriori Bootrom Release 5.3 built Aug 28 2000, 20:19:21
Product Id: S16/O48-POS-1-SR-R (Rev. 04); S/N CELROM000011
Started 1 time
Last started on TUE MAY 29 12:27:11 2001
Module uptime is 19 hours, 15 minutes, 49 seconds
Administratively Up; Current state is Up
Max number of historical logging files: 5
The module Command
The module command is used to enter module mode.
Syntax: [no] module bay#/slot# type
bay#
Defines the bay number in which this module is located. Default = 1
slot#
Defines the slot number to configure. Slots are numbered from 1 to 40 beginning at the top left of the machine. Each physical slot is numbered on the hardware for reference.
type
The type of module to configure in this slot. When configuring a 2-Port Gigabit Ethernet module:
Description: Within module mode, the following commands are available:
The primary function available in module mode is the ability to configure or delete the module that resides in the slot. This is done with the [no] shutdown command. The shutdown command disables and shuts down the module residing in the slot. The no shutdown command enables or configures the module residing in the slot.
Use the no module command to delete a module.
Related Commands: show modules
Display the Modules
Use the show modules command to display the current configuration and state for a module.
Syntax: show modules [bay/slot] [brief]
bay/slot
Show only information for the module residing in bay/slot where bay is the bay number and slot is the slot number.
brief
Display summarized information about the specified module(s).
Description: This command displays configuration information for one or all modules residing in this bay.
The show modules brief command will specify which module is the SAM module by starting the information line with an S in the case of the primary SAM and a B in the case of a backup SAM.
Default: None.
Command Mode: Privileged.
Example 1: In the following example, the show modules command displays information about all the configured modules:
MODULE 1/16:
Discovered (2x1GbE) 2 Port Gigabit Ethernet MPLS-Capable
Configured (2x1GbE) 2 Port Gigabit Ethernet
Physical port type is multi mode fiber
Hardware is 2x1GbE, Version 1.0, Revision 11
Fabric version is 3.0
Ipriori release version: 5.0.10
Operational image version: Platform: cm-d;Label: R5.0_DEV.89, Built on Mo., Day, Year, Time
ROM Version: Ipriori Bootrom Release 6.8 built Mo., Day, Year, Time
Line Card FPGA Software Version: 0.6
Switch CArd FPGA Software Version: 0.8
POST Software Version: 10.6.0
Product Id: (Rev.); S/N
Module CLEI Code:
Last started on Day, Month, Year Time
Module uptime is 31 minutes, 27 seconds
Administratively Up; Current state is Up
Max number of historical logging files: 5
The following table describes the fields in the display:
Example 2: In the following example, the show modules brief command displays summarized information about the modules:
router#show module brief
Module Discovered Configured Last Started State
1/1 4xOC12c 4xOC12c WED DEC 4 10:40:07 2002 Up
1/2 2x1GbE 2x1GbE WED DEC 4 10:40:07 2002 Up
.
.
.
1/14 2x1GbE 2x1GbE WED DEC 4 10:40:08 2002 Up
router#
The following table describes the fields in the display:h
Configuring the Interfaces
Activating a Gigabit Ethernet Interface
PROCEDURE: Use the following steps to configure a Gigabit Ethernet interface:
Step 1 Use the show module command to display configured modules. If the 2-port Gigabit Ethernet module is shut down, use the no shutdown command in module configuration mode to activate the module.
Step 2 Use the configure terminal command to enter configuration command mode.
Step 3 Use the interface command with the gbe key word and bay/slot/port location to enter interface configuration command mode.
Step 4 Optionally, modify the default settings.
Step 5 Optionally, configure a description for the interface using the description command.
Step 6 Configure the local address using the ip address command.
Step 7 Use the no shutdown command to activate the interface.
Step 8 Use the show interface command to display and verify the new interface configuration.
The interface Command
The interface command defines/deletes an interface.
Syntax: [no] interface gbe bay/slot/port
gbe
Configures the interface to support gigabit Ethernet connections.
bay/slot/port
Identifies a specific interface on the TSR. Valid values are as follows:
bay: Bay number. Valid values 1 - 2. Default 1.
slot: Slot number where the module is installed in the TSR. Valid values are integers between 1 and 40.port: Valid values are 1 - 2.
Description: The interface gbe command defines a Gigabit Ethernet interface and enters the interface configuration mode. The interface is not usable as a routing interface until you use the ip address and no shutdown commands.
To configure a gbe interface:
Use the interface gbe bay/slot/port syntax to configure a Gigabit Ethernet interface.
Default: No interfaces configured.
Command Mode: Configuration.
Example: In the following example:
- The interface gbe command configures a Gigabit Ethernet interface for bay 1, slot 1, port 1.
- The ip address command assigns the IP address 5.10.1.2 to the interface.
- The show interface gbe command displays the new setting:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#interface gbe 1/1/1
router(config-if)#ip address 5.10.1.2 255.255.0.0
router(config-if)#no shutdown
router(config-if)#end
router#show interface gbe 1/1/1
GBE 1/1/1 is up
Internet address is 5.10.1.2/16
Broadcast address is 5.10.255.255
Ethernet address is 00:90:b2:fd:00:06
MTU 4470 bytes, Bandwidth 1000 Mbit/Sec
Encapsulation ARPA
Frame type for ARP is ARPA, Frame type for IP is ARPA
Autonegotiation is Disabled, Flow control is symmetric
Received:
474 bytes
0 directed packets, 0 multicast packets, 0 broadcast packets
0 discards, 0 errors, 0 unknown protocols
Transmitted:
2882 bytes
0 directed packets, 1 multicast packets, 1 broadcast packets
0 discards, 0 errors
Related Commands: show interface gbe
show running-config
show startup-config
ip addressDisplay the Gigabit Ethernet Interface
Use the show interfaces gbe command to display information about Gigabit Ethernet interfaces.
Syntax: show interfaces gbe bay/slot/port
bay/slot/port
Identifies a specific interface on the TSR. Valid values are as follows:
bay: numeric identifier for the bay.
slot: Slot number where the module is installed in the TSR. Valid values are integers between 1 and 40.port: The 2x1gbe has 2 ports.
Description: Use the show interfaces gbe command with no arguments to display information about all the gigabit Ethernet interfaces.
Use the show interfaces gbe bay/slot/port command to display information about a specific gigabit Ethernet interface.
Default: None.
Command Mode: Executive and privileged.
Example: In the following example, show interfaces gbe bay/slot/port command displays information about the specified Gigabit Ethernet interface:
router#show interface gbe 1/1/1
GBE 1/1/1 is up
Internet address is 5.10.1.2/16
Broadcast address is 5.10.255.255
Ethernet address is 00:90:b2:fd:00:06
MTU 4470 bytes, Bandwidth 1000 Mbit/Sec
Encapsulation ARPA
Frame type for ARP is ARPA, Frame type for IP is ARPA
Autonegotiation is Disabled, Flow control is symmetric
Received: c
723431054176 bytes
7279943161 directed packets, 0 broadcast packets
0 discards, 0 errors, 0 unknown protocols
Transmitted:
284446377380 bytes
2273151325 directed packets, 0 broadcast packets
0 discards, 0 errors
The following table describes the fields in the display:
Configuring Flow Control
The flowcontrol command provides for configuring the circumstances under which flowcontrol will be used.
Syntax: flowcontrol {asymmetric | symmetric}
no flowcontrol
Description: Flow control controls traffic rates during periods of congestion. Use the flowcontrol asymmetric command to allow the local port to determine whether flow control will be performed on the remote port. During periods of local port congestion, the local port will send a request for the remote port to stop transmitting.
Use the flowcontrol symmetric command to allow for the local port to only perform flow control if the remote port can also perform flow control. If the remote port is not able to perform flow control locally, the local port will also not perform flowcontrol.
Use the no flowcontrol to disable flow control on this interface.
Default: Symmetric.
Command Mode: Gigabit Ethernet interface configuration.
Example: The following set of commands:
- Uses the configure terminal command to enter configuration mode.
- Uses the interface gbe command to enter interface mode for Gigabit Ethernet for the specified port.
- Uses the flowcontrol asymmetric command to set flow control for this interface to asymmetric.
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#interface gbe 1/34/1
router(config-if)#flowcontrol asymmetric
router(config-if)#end
router#
Configuring Autonegotiation
The negotiation auto command enables autonegotiation on an interface.
Syntax: [no] negotiation auto
Description: By detecting the capabilities of the device at the other end of the link autonegotiation attempts to configure the highest performance mode of interoperability between the two devices.
Use the negotiation auto command to enable autonegotiation for this interface.
Use the no negotiation auto command to disable autonegotiation for this interface.
Default: None.
Command Mode: Interface configuration.
Example: The following set of commands:
- Uses the configure terminal command to enter configuration mode.
- Uses the interface gbe command to enter interface mode for Gigabit Ethernet for the specified port.
- Uses the negotiation auto command to enable autonegotiation for the specified interface.
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#interface gbe 1/34/1
router(config-if)#negotiation auto
router(config-if)#end
router#
Configuring ARP
Because the IP network layer is a four-byte address and the Ethernet link layer is a six-byte MAC address, a method of binding these two address types together is required to allow the transmission of data between the layers. Two types of IP to MAC address bindings or entries are supported: static and dynamic.
Static is a manual entry from the CLI using the arp command in interface mode.
Dynamic binding requires a protocol to bind addresses between the two layers. Address Resolution Protocol (ARP) is a low-level protocol that fulfills this function by dynamically binding the configured IP network layer address with the Ethernet link layer hardware address. A dynamic database of address pairings is kept in the ARP cache on each TSR module. Dynamic bindings are learned from the ARP protocol in the following three ways:
- The TSR sends out an ARP request for an IP address. The ARP reply provides the IP address requested by the TSR.
- The TSR was the target of an ARP request. In this case, the new binding is the source IP and MAC address.
- An already existing binding for this TSR is updated by an ARP request or reply that the TSR was neither the source nor the target for.
Dynamic bindings are placed in an ARP Cache and are subject to a uniform timeout or aging policy that takes into account both transmit inactivity as well as failure to periodically refresh those bindings through any one of the above three mechanisms. A timer is started when a new binding is entered for the first time in the ARP Cache, and subsequently reset whenever that binding is updated, or whenever a packet is sent to the entry's IP/MAC address. If the t