NOTE
level-1 and level-2 can be found only on the broadcast interface.
IS-IS maintains neighbor relationships with neighbors through Hello packets. If the local
router does not receive any Hello packet from a neighbor within holding time, the local
router declares that the neighbor is invalid.
In IS-IS, the period during which the local router and its neighbor keep the neighbor
relationship is determined by the invalid number of Hello packets and the interval for
sending Hello packets.
l Configuring the Interval for Sending CSNPs
1. Run:
system-view
The system view is displayed.
2. Run:
interface vlanif vlan-id
The VLANIF interface view is displayed.
3. Run:
isis timer csnp csnp-interval [ level-1 | level-2 ]
The interval for sending CSNPs is set.
CSNPs are transmitted by the Designated IS (DIS) to synchronize an LSDB in a broadcast
network. If the level is not specified, the timer of the current level is configured.
l Configuring the Interval for Retransmitting LSPs
1. Run:
system-view
The system view is displayed.
2. Run:
interface vlanif vlan-id
The VLANIF interface view is displayed.
3. Run:
isis enable
Enable IS-IS on the VLANIF interface
4. Run:
isis circuit-type p2p
Sets the interface network type as P2P.
5. Run:
isis timer lsp-retransmit retransmit-interval
The interval for retransmitting LSPs on a P2P link is set.
On a P2P link, if the local router does not receive the response within a period of time after
it sends an LSP, it considers that the LSP is lost or dropped. To ensure the reliable
transmission, .the local router retransmits the LSP according to the retransmit-interval. By
default, the interval for retransmitting the LSP packet on the P2P link is 5 seconds.
The LSPs sent on a broadcast link do not need any response.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
255
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