ISIS-SPB control packets

ISIS-SPB control packets include hello, LSP, and SNP. All SPBM control packets are encapsulated in 802.1q.

Hello

SPBM neighbors send IS-IS hello (IIH) PDUs to establish and maintain adjacencies.

LSP

Adjacent SPBM neighbors send link state PDUs (LSPs) to advertise topology data.

SNP

Adjacent SPBM neighbors exchange sequence number PDUs (SNPs) for LSDB synchronization.

SNPs include complete SNP (CSNP) and partial SNP (PSNP).