I've been working on a home lab scenario involving ISIS and it's been driving me crazy. The behavior appears to be a split horizion issue even though ISIS(like OSPF) is a link state protocol and shouldn't have a problem with this. The scenario involves a hub router R4 and two spoke routers r2,r3. R4 is connected via a multipoint sub-interface to the physical frame relay interfaces on r2 and r3. There a various routers behind both of the spoke routers and the hub router. R4 sees all routes on the network as do the routers located behind R4. R2 see's all routes on the network except those behind r3 and r3 sees all routes except for those behind r2. In this setup ISIS sends out multicasted LAN hellos that are picked up by other routers. I thought perhaps that like the OSPF neighbor command that I've used in hub and spoke setup's I could use the clns is-neighbor interface command, but all I get are messages saying you cannot put static IS or ES mappings on a Frame Relay interface. Anyway, what follows are the relevant config's. I was hoping someone may spot something I haven't seen.
R4# interface Serial0.2 multipoint ip address 10.10.234.4 255.255.255.240 no ip directed-broadcast ip router isis 0 no ip split-horizon clns router isis 0 isis priority 127 frame-relay map clns 102 broadcast frame-relay map clns 103 broadcast frame-relay interface-dlci 102 frame-relay interface-dlci 103 router isis 0 net 49.0000.0000.0000.0004.00 r2# interface Serial1/0 ip address 10.10.234.2 255.255.255.240 ip router isis 0 encapsulation frame-relay clns router isis 0 frame-relay map clns 104 broadcast frame-relay map ip 10.10.234.3 104 frame-relay map ip 10.10.234.4 104 broadcast router isis 0 net 49.0000.0000.0000.0002.00 r3# interface Serial1/0 ip address 10.10.234.3 255.255.255.240 ip router isis 0 encapsulation frame-relay clns router isis 0 frame-relay map clns 104 broadcast frame-relay map ip 10.10.234.2 104 frame-relay map ip 10.10.234.4 104 broadcast router isis 0 net 49.0000.0000.0000.0003.00 -- James Haynes Network Architect Cendant IT A+,MCSE,CCNA,CCDA,CCNP,CCDP, CQS-SNA/IPSS Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=33096&t=33096 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
