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close-threshold


Sets the bandwidth threshold for closing a composite link.

Syntax: [no] close-threshold value

value

Sets the bandwidth threshold for closing down a composite link in Mb/sec. If the value is set to zero (0), the composite link closes only after the last member-link closes. If the value is set to n, the composite link closes down when the aggregate bandwidth of the member-links falls below n.

Description: Composite links consist of sets of member-links. Each member-link has a specific bandwidth.

You can configure the composite link to close when the last member link closes, (close threshold value = 0), or when the aggregate bandwidth provided by all the active links in the composite link falls below the close threshold.

NOTE The value configured by the close threshold command must be smaller than the value configured by the open threshold command.

Use the close-threshold value command to set the close bandwidth threshold for the composite link.Values must be multiples of OC-3c available bandwidth. The following table lists the transmission rates and available bandwidths for the most widely used OC speeds:

Table 4-1. OC Transmission Rates and Bandwidths 
OC Designation Transmission Rate Available Bandwidth

4xOC-3c

155.520 Mb/sec

150 Mb/sec

4xOC-12c

622.080 Mb/sec

601.34 Mb/sec

1xOC-48c

2488.320 Mb/sec

2405.38 Mb/sec

1xOC-192c

9953.280 Mb/sec

9621.5 Mb/sec

For example, if the composite link consists of 4 OC-3c interfaces and 1 OC-12c interface, the maximum bandwidth for the composite link is (4 x 155.52) + (622.08) = 1244.16 Mb/sec.

Use the no close threshold command to set the close bandwidth threshold at the default value of 0.

Factory Default: 0. Close composite link when the last member link closes.

Command Mode: Composite-link configuration.

Example 1: In the following example, the close-threshold command sets the bandwidth threshold to close the composite link if the aggregate bandwidth of the active member-links falls below 600 Mb/sec. The show interface composite-link command displays the new setting.

router#configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

router(config)#interface composite-link la

router(config-if)#close-threshold 600

router(config-if)#no shut

router(config-if)#end

router#show interface composite-link la

Internet address is 100.100.100.2/16

Remote address is 100.100.100.1

MPLS: administratively down

MTU 4470 bytes

Payload BW: configured 2404 Mbit/Sec, available 1803 Mbit/Sec

Total BW: configured 2488 Mbit/Sec, available 1866 Mbit/Sec

Member links: 4 configured, 3 up

Thresholds: up 0 Mbit/Sec, down 600 Mbit/Sec

Received:

1209038 bytes

33488 directed packets, 0 multicast packets, 0 broadcast packets

0 discards, 0 errors, 0 unknown protocols

22 Bytes/Sec averaged, Bandwidth Utilized < 1%

Transmitted:

33709260 bytes

334956 directed packets, 0 multicast packets, 0 broadcast packets

0 discards, 0 errors

17 Bytes/Sec averaged, Bandwidth Utilized < 1%

Related Commands: interface composite-link
member-link pos
open-threshold
show interface composite-link


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Copyright © 2005 Avici Systems Inc.
Avici® and TSR® is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are trademarks of Avici Systems Inc.

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    Last Updated: 02/25/05 at 14:28:34

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