Operation Manual – IPv4 RoutingH3C S7500E Series Ethernet Switches Chapter 4 IS-IS Configuration4-15CLV Code Name PDU Type9 LSP Entries SNP10 Authentication Information IIH, LSP, SNP128 IP Internal Reachability Information LSP129 Protocols Supported IIH, LSP130 IP External Reachability Information L2 LSP131 Inter-Domain Routing Protocol Information L2 LSP132 IP Interface Address IIH, LSPCode 1 to 10 of CLV are defined in ISO 10589 (code 3 and 5 are not shown in the table),and others are defined in RFC 1195.4.1.5 IS-IS Features SupportedI. Multiple processesIS-IS supports multiple processes. Multiple processes allow a designated IS-IS processto work in concert with a group of interfaces. This means that a router can run multipleIS-IS processes, and each process corresponds to a unique group of interfaces.II. Hot standbyNote:For detailed information about IS-IS hot standby, refer to HA Configuration.A distributed router supports IS-IS Hot Standby (HSB) function. The data are copiedfrom the Active Main Board (AMB) to the Standby Main Board (SMB). Whenever theAMB is down, the SMB can switch to the active status to maintain IS-IS normaloperation.III. Management tagManagement tag carries the management information of the IP address prefixes andBGP community attribute. It controls the redistribution from other routing protocols.IV. LSP fragment extensionIS-IS advertises link state information by flooding LSPs. One LSP carries limitedamount of link state information; therefore, IS-IS fragments LSPs. Each LSP fragmentis uniquely identified by a combination of the System ID, Pseudonode ID (0 for a
