CSNP P2P Networks

Dear Friend, hope it can help u:

Complete sequence number PDUs (CSNPs) contains the summary of all the LSPs in an LSDB to ensure LSDB synchronization between neighbors. CSNPs are processed differently on broadcast and P2P links.
On a broadcast link, CSNPs are periodically sent by a DIS device. If a device detects that its LSDB is not synchronized with that on its neighboring device, the device will send PSNPs to apply for missing LSPs.
On a P2P link, CSNPs are sent only during initial establishment of neighboring relationships.

https://support.huawei.com/enterprise/en/doc/EDOC1000027377?section=j00a

Thanks!

Hi Herediano,
The CSNP is used to update the LSDB.
1. On a P2P network, there are only two nodes. Therefore, CSNPs do not need to be periodically sent to update LSPs.
2. The bandwidth of P2P links is low. If CSNPs is periodically sent, the bandwidth burden is high.
I hope it helps!

Thank you for sharing