From: keith tokash (ktokash@hotmail.com)
Date: Sun Nov 18 2007 - 18:54:29 ART
I have a rather odd problem. I'm working on IE lab 4, task 4.2, which is a
basic OSPF neighbor-building task (with twist of course, but that's not
relevant to my dilemma). I must configure OSPF between a backbone router and
my R1. The physical hops between the two interfaces are two switches trunked
together and by all appearances working fine. However even after reducing the
configuration to the most basic form my neighbor relationship reaches FULL,
then dies after a couple of minutes. Furthermore, if I debug IP packets (tied
to acl specifying ICMP) on R1, I can see pings launched from the backbone
router. R1 replies to them out the correct interface ... and they die
somewhere on the return path.
NEIGHBOR BUILD AND DEATH
%OSPF-5-ADJCHG: Process 1, Nbr 150.1.1.1 on FastEthernet0/0 from LOADING to
FULL, Loading Done
BB2#
%OSPF-5-ADJCHG: Process 1, Nbr 150.1.1.1 on FastEthernet0/0 from FULL to DOWN,
Neighbor Down: Too many retransmissions
FAILED PING FROM BACKBONE PERSPECTIVE
BB2#ping 192.10.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.10.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
FAILED PING FROM R1 PERSPECTIVE
Rack1R1#
*Jun 11 02:28:13.544: IP: tableid=0, s=192.10.1.254 (Ethernet0/0),
d=192.10.1.1 (Ethernet0/0), routed via RIB
*Jun 11 02:28:13.544: IP: s=192.10.1.254 (Ethernet0/0), d=192.10.1.1
(Ethernet0/0), len 100, rcvd 3
*Jun 11 02:28:13.544: ICMP type=8, code=0
*Jun 11 02:28:13.548: IP: tableid=0, s=192.10.1.1 (local), d=192.10.1.254
(Ethernet0/0), routed via FIB
*Jun 11 02:28:13.548: IP: s=192.10.1.1 (local), d=192.10.1.254 (Ethernet0/0),
len 100, sending
*Jun 11 02:28:13.548: ICMP type=0, code=0
<snip>
Has anyone experienced multicast success and unicast failure? Outside of acls
of course, which I have confirmed do not exist in this path.
With a few exceptions, secrecy is deeply incompatible with democracy and with
science.
--Carl Sagan
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:30 ART