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The Optical Internetworking Forum (OIF) defines a User Network Interface (UNI) as a protocol supporting dynamic provisioning of bandwidth allowing packet-switched and optical networks to interoperate. On Avici routers, this protocol is known as OIF-UNI which allows router (packet-switched) networks to transverse optical networks and reconnect to routers (see Figure 5-1). Avici supports Packet-over-Sonet (POS) in this implementation.
Configuring OIF-UNI
OIF-UNI implementation begins with configuration of optical nodes on routers in packet-switched networks. Optical nodes define the links that provide the "entrance to" and "exit from" the optical network (see
Figure 5-1. OIF-UNI Configuration
Figure 5-1) They need to be configured at both the entrance and the exit from the optical network. Optical paths, or interfaces, are then configured and associated with each optical node. Each optical node supports multiple optical paths.
The optical path allows IP traffic to connect to and transverse the optical networks and to reconnect to an IP router. There may be one or many optical paths on an optical node depending on bandwidth distribution (see Figure 5-2).
Figure 5-2. Optical Paths in an OIF-UNI Network
Configuring Optical Nodes
Optical node configuration is the first step in implementing OIF-UNI. Use the optical-node command to configure an optical node and configure optical nodes on both routers. Issuing the optical-node command causes the CLI the prompt to enter into configuration-optical command mode allowing further configuration of the node.
The following is an overview of the steps to configure an optical node:
- Configure and name an optical node on an Avici router using the optical node command.
- Configure the Transport Network Address (TNA). There is a TNA address for every optical node connected to the OIF-UNI network (see Figure 5-3).
The TNA address uniquely identifies the beginning and end of the OIF-UNI connection.
Figure 5-3. Optical Node Configuration (1)
- Set the signaling Control Channel IP Address. This is the IP address of the optical switch's signaling channel.
- Assign the member Links. Member links are links between the router and the switch network ports and client ports and correlate interface connections (see Figure 5-4).
- Issue the no shutdown command. Issuing the no shutdown command enables the optical node.
When required, use the shutdown command to disable optical nodes.
Figure 5-4. Optical Node Configuration (2)
PROCEDURE: Use the following steps to configure an optical node on the router that is to serve as the initiating point:
Step 1 Use the configuration terminal command to enter configuration mode.
Step 2 Use the optical-node name command to name an optical node.
Step 3 Use the tna-local TNA_address command to set the address of the optical node being configured.
Step 4 Use the ipcc-remote-addr command to set the IP control channel.
Step 5 Use the member-link pos bay/slot/port client-port port-id network-port port id command to specify the port connections (see Figure 5-4).
Step 6 Use the no shutdown command to enable to enable the optical node.
Step 7 Repeat Step 1 through Step 6 to configure the router that is to serve as the other side of the OIF-UNI network.
Step 8 Repeat Step 1 through Step 7 to configure the remaining routers connected to the OIF-UNI network.
Step 9 On both nodes, use the show oif-uni optical node name command to view configuration settings.
This example show the configuration of an optical node:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#optical node opt1
router(config-opt)#tna-local 10.10.10.1
router(config-opt)#member-link pos 1/1/1 client port 1 network-port 2
router(config-opt)#ipcc-address 10.200.81.1
router(config-opt)#no shutdown
router(config)#interface optical-path lp1
router(config)#end
router#show oif-uni optical-node opt1
net1 AdminStatus = UP OperStatus = UP
ConnectionsStatus = Operational
Local TNA Address 6.6.6.1
Signaling IPCC Remote End Address 10.210.169.62
Connection Retry Disabled
Connection Rerouting Disabled
router#
Configuring Optical Paths
After configuring the optical nodes, create an optical-path and associate it with an optical node.
In an OIF_UNI network, optical paths serve either as initiators or terminators. In addition, optical path configurations include:
- Assigning an optical-path to an optical node
- Naming the optical-path and configuring its IP address
- Specifying whether the optical-path is an initiator or a terminator
- Configuring the peer default IP address
- Configuring bandwidth
To enable the optical-path(s), use the no shutdown command in interface configuration mode. The optical-path(s) activate and are ready to transmit traffic.
When required, use the shutdown command to disable optical-paths.
PROCEDURE: Use the following steps to configure an optical-path:
Step 1 Use the configuration terminal command to enter configuration mode.
Step 2 Use the interface optical-path name command to enter configuration-interface mode and to configure an optical-path interface.
Step 3 Use the local-optical-node name command to associate this optical-path with an optical node. The name variable is the optical node name.
Step 4 Use the tna-remote address command to configure the remote TNA IP address (see Figure 5-5).
Figure 5-5. Optical Path Configuration (1)
Step 5 Depending on the optical path's orientation, use the no terminator command to set it as an initiator or use the terminator command to set it as termination point.
Step 6 Use the ip address IP address command to set the IP address of this end of the optical path (see Figure 5-6).
Step 7 Use the peer default ip address IP address command to configure the IP address of the remote end of the optical-path (see Figure 5-6).
Figure 5-6. Optical Path Configuration (2)
Step 8 Optionally, use the tunnel-name name command to configure a name for this optical-path. The tunnel name defaults to the interface name if the tunnel name is not configured.
Step 9 Use the bandwidth-min oc bandwidth factor factor and bandwidth-max oc bandwidth factor factor commands to set minimum and maximum bandwidths. Bandwidth refers to module speed/capacity and factor refers to numbers of module ports (see the examples in Table 5-1).
For both commands, if the factor factor is not specified, the default factor is 1. If minimum bandwidth is not specified, the minimum will be the same as the requested.
Table 5-1. Bandwidth Allocation Bandwidth (Speed/ Capacity) Factor (Number of Ports) Bandwidth Command Example: OC48
2
bandwith-min oc 48 factor 2
OC192
1
bandwidth max oc 192 factor 1
Step 10 Use the no shutdown command to enable the optical-path (see Figure 5-7).
Figure 5-7. Active OIF-UNI Configuration
Step 11 Use the show oif-uni optical-path list command to display optical-path configuration information for all paths.
Example: For example:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#interface optical-path 1p1
router(config-if)#local-one opt1
router(config-if)#tna-remote 10.10.10.3
router(config-if#)ip address 1.1.1.2 255.255.255.0
router(config-if)#peer default ip address 1.1.1.1
router(config-if)#bandwidth-min oc 3 factor 1 oc 12 factor 1
router(config-if)#bandwidth-max oc 3 factor 2 oc 12 factor 2
router(config-if)#terminator
router(config-if)#no shutdown
router(config-if)#end
router#show oif-uni optical-path-list
1p1 AdminStatus = UP OperStatus = DOWN
router#
Another command used to display detailed information is the show interfaces optical-path command shown below:
router#show interfaces optical-path 1p1
Optical-Path Terminator oDe1 is up
Optical Path Connection Status : Max Threshold Links Up
Internet address is 12.12.12.1/24
Remote address is 12.12.12.2
MPLS: administratively down
MTU 4470 bytes
5 min in rate 177.6000 b/s, 0.0000 packets/s,
0.0000% util
5 sec in rate 0.0000 b/s, 0.0000 packets/s,
0.0000% util
5 min out rate 67.2000 b/s, 0.0000 packets/s,
0.0000% util
5 sec out rate 0.0000 b/s, 0.0000 packets/s,
0.0000% util
Payload BW: configured 601.343994 Mbit/Sec, available 0.000000
Mbit/Sec
Total BW: configured 622.080017 Mbit/Sec, available 622.080017
Mbit/Sec
Member Links: Connected[1] 1xOC12, Up 1
Link Type Thresholds: Minimum 1xOC12, Maximum 1xOC12
Bandwidth Thresholds: Minimum 601 Mbit/Sec, Maximum 601 Mbit/Sec
Received:
252109 bytes
3101 directed packets, 0 multicast packets, 0 broadcast packets
16 discards, 16 errors, 0 unknown protocols
1 Bytes/Sec averaged, 8% of Bandwidth Utilized
Transmitted:
186 bytes
3093 directed packets, 0 multicast packets, 0 broadcast packets
0 discards, 0 errors
0 Bytes/Sec averaged, Bandwidth Utilized n/a %
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Avici Systems Inc.
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Last Updated: 02/25/05 at 15:38:21