Setting Flooding Parameters Of Snps And Lsps - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
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6.8.3 Setting Flooding Parameters of SNPs and LSPs

To speed up LSDB synchronization between devices, set flooding parameters of SNPs and LSPs
to proper values.
Context
SNPs consist of CSNPs and PSNPs. CSNPs carry summaries of all LSPs in LSDBs, ensuring
LSDB synchronization between neighboring routers. SNPs are processed differently on
broadcast links and P2P links.
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To speed up LSDB synchronization, modify the following parameters of SNPs and LSPs on the
S6700:
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Issue 01 (2012-03-15)
Set the holding multiplier for neighboring devices.
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
3. Run:
isis timer holding-multiplier number [ level-1 | level-2 ]
The holding multiplier of neighboring devices is set.
NOTE
A broadcast link can transmit both Level-1 and Level-2 Hello packets. You can set different
sending intervals for these two types of Hello packets. By default, both Level-1 and Level-2
Hello packets are sent.
A P2P link can transmit only one type of Hello packets. Therefore, there is no need to specify
the level-1 or level-2 parameter if a P2P link is used.
On a broadcast link, CSNPs are periodically sent by a DIS device. If a router detects that
its LSDB is not synchronized with that on its neighboring router, the router will send PSNPs
to apply for missing LSPs.
On a P2P link, CSNPs are sent only during initial establishment of neighboring
relationships. If a request is acknowledged, a neighboring router will send a PSNP in
response to a CSNP. If a router detects that its LSDB is not synchronized with that on its
neighboring router, the router will also send PSNPs to apply for missing LSPs.
Interval at which CSNPs are sent
Intelligent timer controlling LSP generation
Maximum length of LSPs
Refresh interval of LSPs
Maximum lifetime of LSPs
Minimum interval at which LSPs are sent
LSP fast flooding
Interval at which LSPs are retransmitted over a P2P link
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6 IS-IS Configuration
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