From: sherry huies (cholscurry@xxxxxxxxxxx)
Date: Mon Feb 11 2002 - 10:57:26 GMT-3
Hi all,
I have a problem on catalyst ISL Trunk problem.
my R5-router's loopback0 is 175.3.5.0/24.
R5 is connected to R6 via Fastethernet(175.3.56.5/24)
R6's interface is a Fastethernet Trunking(ISL)0/1.10
between R5 and R6, if i run OSPF or EIGRP,
R6's routing table is good.
that is R6 has the 175.3.5.0 on its routing table.
but, if i run RIP or IGRP between R5 and R6,
R6 doesn't have the 175.3.5.0 on its routing table.
of course, R6 has the 175.3.5.0 in a short time.
but after a while, 175.3.5.0 is possibly down
and disappeared on R6 routing table.
so when i try to debug on R5 and R6,
R5 continue to send the 175.3.5.0 to R6,
but, on R6, the receiving debug message dose not show.
If i change the R6's ISL FastEthernet
to main FastEthernet
all routing protocol(including RIP,IGRP) is good.
is there any problem between ISL and RIP,IGRP?
Any suggestions on what I am doing wrong?
=======================================================
R5#sh run
interface Loopback0
ip address 175.3.5.5 255.255.255.0
interface FastEthernet0/0
ip address 175.3.56.5 255.255.255.0
router igrp 500
network 175.3.0.0
Rack01R5#sh ip route
Gateway of last resort is not set
C 175.3.5.0 is directly connected, Loopback0
C 175.3.56.0 is directly connected,
FastEthernet0/0
I 175.3.6.0 [100/610] via 175.3.56.6,
00:01:06, FastEthernet0/0
=======================================================
R6#sh run
interface Serial0/0
ip address 175.3.6.5 255.255.255.0
interface FastEthernet0/1
no ip address
interface FastEthernet0/1.10
encapsulation isl 10
ip address 175.3.56.6 255.255.255.0
!
interface FastEthernet0/1.20
encapsulation isl 20
no ip address
router igrp 500
network 175.3.0.0
R6#sh ip route
Gateway of last resort is not set
C 175.3.6.0/24 is directly connected,Serial0/0
C 175.3.56.0/24 is directly connected,
FastEthernet0/1.10
I 175.3.5.0/24 [100/610] via 175.3.56.5,
00:00:00, FastEthernet0/1.10
=======================================================
2~~~3 minute later R6's table
R6#sh ip route
Gateway of last resort is not set
C 175.3.6.0/24 is directly connected,Serial0/0
C 175.3.56.0/24 is drectly connected,
FastEthernet0/1.10
I 175.3.5.0/24 is possibly down,
routing via 175.3.56.5, FastEthernet0/1.10
======================================================
if i change the R6's ISL interface to main interface,
this problem is disappeared at once.
Of course, OSPF and EIGRP have no problem under same
configuration(ISL).
why doesn't R6 receive IGRP,RIP update packet?
R6 receive very well OSPF hello packet
if i try to debug ip ospf hello.
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:18 GMT-3