Catalyst 2950: front-end loopback test
Robert Perkuhn
I have a problem concerning a Catalyst 2950-48:
Cisco-3#sh post
POST FAILED: FastEthernet0/41 failed front-end loopback test
POST FAILED: FastEthernet0/42 failed front-end loopback test
POST FAILED: FastEthernet0/43 failed front-end loopback test
POST FAILED: FastEthernet0/44 failed front-end loopback test
[...]
Some searching on cisco.com brought up this link:
http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a0080125913.shtml#topicsub1
According to that those ports are defective (I think it doesn't matter
if it is a Catalyst 2900xl or a 2950-48).
Am I right? Or is there a "software trick" to fix that?
I aready did an "erase all"...
Perhaps it helps if I describe how the error occured:
I added a second vlan (Ports 41-48) where I wanted to connect some
switches from other floors. So on this 2950-48 there should be clients
connected to vlan1 and other switches and the uplink connected to vlan2.
To create a connection between the clients in vlan1 and the uplink on
vlan2 I used a crossover cable between port 1 and port 41. Up to this
point everything went fine, the clients on vlan1 had a "normal" network
connection. (actually I had only connected the uplink, the crossover
cable and a client on port 2 since I was still testing).
Then I changed the management vlan on the web-interface from vlan 1 to
vlan 2. I did this from the client connected to port 2 (vlan 1). Because
of the change of the management vlan I lost connection on the web
interface, which is I think is a normal thing.
But since then the ports belonging to vlan 2 wouldn't get into "state
up" anymore.
Any ideas?
Tanks!!
greetings
robatp
PS:
Here are some system boot messages and a "sh ver" that might help:
[...]
POST: System Board Test : Passed
POST: Ethernet Controller Test : Passed
ASIC Initialization Passed
cisco WS-C2950G-48-EI (RC32300) processor (revision G0) with 20402K
bytes of mem
ory.
Processor board ID FOC0702X04M
Last reset from system-reset
Running Enhanced Image
40 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)
[...]
Press RETURN to get started!
00:00:17: POST: Loop back Test Failed on FastEthernet0/41. State:Disabled
00:00:17: POST: Loop back Test Failed on FastEthernet0/42. State:Disabled
00:00:17: POST: Loop back Test Failed on FastEthernet0/43. State:Disabled
00:00:17: POST: Loop back Test Failed on FastEthernet0/44.
State:Disabled
[...]
00:00:17: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan
000011: 00:00:23: Fa0/42 can't be brought up because it failed POST in
loopback
test
000012: 00:00:23: Fa0/43 can't be brought up because it failed POST in
loopback
test
000013: 00:00:23: Fa0/44 can't be brought up because it failed POST in
loopback
[...]
Switch>sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(11)EA1, RELEASE
SOFTWARE
(fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Wed 28-Aug-02 10:25 by antonino
Image text-base: 0x80010000, data-base: 0x80528000
ROM: Bootstrap program is CALHOUN boot loader
Switch uptime is 4 minutes
System returned to ROM by power-on
System image file is "flash:c2950-i6q4l2-tar.121-12c.EA1.bin"
cisco WS-C2950G-48-EI (RC32300) processor (revision G0) with 20402K
bytes of memory.
Processor board ID FOC0702X04M
Last reset from system-reset
Running Enhanced Image
40 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0B:FD:29:0B:C0
Motherboard assembly number: 73-7409-11
Power supply part number: 34-0965-01
Motherboard serial number: FOC07020350
Power supply serial number: PHI06480GT8
Model revision number: G0
Motherboard revision number: A0
Model number: WS-C2950G-48-EI
System serial number: FOC0702X04M
Configuration register is 0xF
Brian
ports each, so basically asic chip# 11 is bad. There's a lifetime warranty
on the switch to the original purchaser, so just open a TAC case and get it
replaced.
-Brian
"Robert Perkuhn" <rob...@dorf.rwth-aachen.de> wrote in message
news:bebj8f$oa5$1...@nets3.rz.RWTH-Aachen.DE...