Command "default-information originate" in isis enable L1L2 IS generates a 0.0.0.0/0 prefix in its Level-2 lsp.But what will happen if the L1L2 IS is unattached from backbone?dut1-----L2(LAN1)--------dut2 | | |______L1(LAN2)__...
1.Why does not cisco's isis add authentication CLV in SNPDUs,even text authentication has been enable on both area and domain level?2. RouterA-------------------------------RouterB L1L2 L1L2 Enabl...
The reason is in rfc2328 16.4.1,the folloing is copy from rfc2328,it's the answer.The path preference rules, stated from highest to lowest preference,are as follows......... o Intra-area paths using non-backbone areas are always the most preferred. o...
using isis as PE-CE routing protocol requires that more than one isis processes running separately.cisco supports multiple instances isis,but every instance is NOT separate.for example,a router can operate as level-2 router only in one instance,but a...
Thanks Russ.In order enable ospf prefer vpn backbone route over backdoor route between two sites,the latter usually is intra-area route,It's necessary that sham link is treated as a intra-area link.So,sham link and pe/ce link should be in the same ar...
Thanks for your reply!Thanks!About my first question,"overflow" comes from rfc1765,it means "some routers may be unable to keep the entire database due to resource shortages".I can't find overflow command in cisco's CLI,so I ask this question.The sec...
