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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Strange behavior of Catalyst4006
Hi,
We met a strange problem with Catalyst 4006 when provideing leased line service to one of our customers.
Catalyst4006 ------------ Customer's firewall ---------------Customer's Intranet
The customer is allocated a Class C address block 192.168.5/24. And , they connect their network to our
network by using a firewall. The Interface on Cata4006 is set up as "no switchport", and inter-connecting
subnet is configured between Cata4006 and firewall interface(10.10.1.122/30).
Static route is used on Catalyst4006 to designate route to customer's intranet address. ( ip route 192.168.5.0
255.255.255.0 10.10.1.124 ). Customer setup their email server at 192.168.5.7, dns server at 192.168.5.1,
web server at 192.168.5.9.
At the very begining all system works fine. After sometime they said they could not acces their email/web/dns
server from host outside their company's network. But, when we telnet to Cata4006, we could 'ping'
192.168.5.7, but if we move to host in NOC ping failed all the time. ( ping to server is allowed on firewall). At the same
time, their intranet host could access our network.
We restart ( shut; noshut) the fastethernet interface on Catalyst4006, and then servers' network access recovered.
The phenomon comes up frequently, and our customer said this is a bug with catalyst4006. But, to my understanding,
if this is a bug to catos, it should not only affact only three servers. But, why it could be solved by restart catalyst interface?
Would you please do some help? ( I attach system info below)
Joe Shen
======================-=
4006#sh version
Cisco Internetwork Operating System Software
IOS (tm) Catalyst 4000 L3 Switch Software (cat4000-IS-M), Version 12.1(12c)EW1, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1) TAC Support: http://www.cisco.com/tac Copyright (c) 1986-2002 by cisco Systems, Inc. Compiled Thu 24-
Oct-02 23:05 by eaarmas Image text-base: 0x00000000, data-base: 0x00CA7368
ROM: 12.1(12r)EW
Dagobah Revision 63, Swamp Revision 24
4006-wulin uptime is 41 weeks, 12 hours, 34 minutes
System returned to ROM by power-on
System restarted at 05:40:46 RPC Mon Sep 15 2003
System image file is "bootflash:cat4000-is-mz.121-12c.EW1.bin"
cisco WS-C4006 (XPC8245) processor (revision 5) with 524288K bytes of memory. Processor board ID FOX05200BRH Last
reset from PowerUp 144 FastEthernet/IEEE 802.3 interface(s) 2 Gigabit Ethernet/IEEE 802.3 interface(s) 403K bytes of non-
volatile configuration memory.
Configuration register is 0x2102
4006#
4006-wulin#sh run int f4/41
Building configuration...
Current configuration : 141 bytes
!
interface FastEthernet4/41
no switchport
ip address 10.10.1.213 255.255.255.252
duplex full
speed 100
end
4006#
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