From: Marko Milivojevic (markom@vodafone.is)
Date: Mon Jul 02 2007 - 12:04:33 ART
It is entirely possible that this is Dynamips/Dynagen related issue. I
also posted on Hacki's forum, but I would just like to confirm that I'm
not misconfiguring something, before blaming the software for my errors
;-)
I am using 12.2(25)S11 SP IOS images. When configuring CsC between two
emulated 7200 routers, LDP keeps flapping and I cannot ping connected
interfaces. In the example below, R2 (CSC-CE) is connected to R3
(CSC-PE) using Se1/1. I could post IGP configs, but I somehow doubt they
are relevant (OSPF running on all interfaces in main routing table on
CSC Customer and in VRF on CSC-PE).
R2:
interface Serial1/1
ip address 172.16.23.2 255.255.255.0
! not quite sure if this needed, but it doesn't change behaviour when
removed
mpls ldp discovery transport-address interface
mpls label protocol ldp
mpls ip
serial restart-delay 0
no clns route-cache
!
R3:
interface Serial1/1
ip vrf forwarding AS2
ip address 172.16.23.3 255.255.255.0
! not quite sure if this needed, but it doesn't change behaviour when
removed
mpls ldp discovery transport-address interface
mpls label protocol ldp
mpls ip
serial restart-delay 0
no clns route-cache
!
Now, the fun part:
Code:
R2#ping 172.16.23.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int se1/1
R2(config-if)#no mpls ip
R2(config-if)#end
R2#
00:52:49: %LDP-5-NBRCHG: LDP Neighbor 172.16.23.3:0 is DOWN
00:52:50: %SYS-5-CONFIG_I: Configured from console by console
R2#ping 172.16.23.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.3, timeout is 2 seconds:
..!!!
Success rate is 60 percent (3/5), round-trip min/avg/max = 4/9/16 ms
I am semi-suspecting that this is Dynamips-related issue (it could be
IOS, but I'm experiencing similar problem when using 3640 Telco image).
Did someone else experience something like this?
Of course, it's always possible that I horribly misconfigured something,
but I was always able to ping connected interface even if that was the
case.
Any ideas?
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:39 ART