Re: 2960L SVI issue - Page 2

AdamW01248 · ‎07-02-2020

I have a 24port 2960-L (running the latest IOS) which being passive cooled fits my requirement well.

I have configured it with a number of VLANs with a SVI on each and enabled routing.

Seemingly at random an SVI stops responding. Unfortunately I was in a hurry to get things working so power cycled the switch which resolved the issue. I'm hopeful next time it occurs (its already happened a number of times) I can get a laptop and console cable to see what's happening. Other than that its working perfectly.

Has anyone experienced a similar issue with the 2960-L series? any hints on where to look for issues?

s.hellman · ‎02-24-2021

Is there anything else I shoulld test before i do shutdown/no shutdown and run the commands again?

Georg Pauwen · ‎02-24-2021

Hello,

this is an old thread, are you experiencing the exact same problem ? Post the output of:

sh ver

s.hellman · ‎02-25-2021

Georg, yes I think that it is the same problem, except that we dont have routing enabled. SVI randomly stops responding, and we have to restart the switch or do a shutdown/no shutdown on the vlan interface to get it working again.

It dont happen that often, we have about a hundred C2960L in our network, and this has happend 10-15 times in a year.

Different switches, some once , a couple of them two times. Different firmware 15.2(7)E0 - E3

-----------------------

Drottningatan_22_C2960_193.65#show ver

Cisco IOS Software, C2960L Software (C2960L-UNIVERSALK9-M), Version 15.2(7)E2, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2020 by Cisco Systems, Inc.
Compiled Sat 14-Mar-20 15:38 by prod_rel_team

ROM: Bootstrap program is C2960L boot loader
BOOTLDR: C2960L Boot Loader (C2960L-HBOOT-M) Version 15.2(5r)E3, RELEASE SOFTWARE (fc2)

Drottningatan_22_C2960_193.65 uptime is 29 weeks, 6 days, 3 hours, 15 minutes
System returned to ROM by power-on
System restarted at 10:10:43 UTC Fri Jul 31 2020
System image file is "flash:c2960l-universalk9-mz.152-7.E2/c2960l-universalk9-mz.152-7.E2.bin"
Last reload reason: power-on

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C2960L-24PS-LL (Marvell PJ4B (584) v7 (Rev 2)) processor (revision G0) with 524288K bytes of memory.
Processor board ID FCW2313A1AL
Last reset from Reload
1 Virtual Ethernet interface
28 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : AC:F5:E6:05:92:00
Motherboard assembly number : U58O342T03
Power supply part number : 341-100560-01
Motherboard serial number : FOC23117Z49
Power supply serial number : LIT23072Q4W
Model revision number : G0
Motherboard revision number : 23
Model number : WS-C2960L-24PS-LL
System serial number : FCW2313A1AL
Top Assembly Part Number : 74-105856-01
Top Assembly Revision Number : H0
Version ID : V01
CLEI Code Number : CMMWK00ARA
Hardware Board Revision Number : 0x02

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 28 WS-C2960L-24PS-LL 15.2(7)E2 C2960L-UNIVERSALK9-M

Configuration register is 0xF

Richard Burts · ‎02-25-2021

You asked "Is there anything else I should test before i do shutdown/no shutdown and run the commands again?" I would say run the commands, verify that the addresses in the arp table, attempt to traceroute to each of the IP addresses in the arp table, check for any log messages, then shut/no shut, and run the commands again. I would hope that we might find something different in the before and after outputs.

HTH

Rick

s.hellman · ‎02-25-2021

Before I do shutdown/no shutdown on interface Vlan 1:

-------------------------------------
Drottningatan_22_C2960_193.65#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.193.1 0 4431.92f8.1faa ARPA Vlan1
Internet 192.168.193.65 - acf5.e605.9240 ARPA Vlan1
Drottningatan_22_C2960_193.65#

-------------------------------------
Drottningatan_22_C2960_193.65#show ip route
Default gateway is 192.168.193.1

Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty

-------------------------------------
Drottningatan_22_C2960_193.65#show ip inte brief
Interface IP-Address OK? Method Status Protocol
Vlan1 192.168.193.65 YES NVRAM up up
GigabitEthernet0/1 unassigned YES unset down down
GigabitEthernet0/2 unassigned YES unset down down
GigabitEthernet0/3 unassigned YES unset down down
GigabitEthernet0/4 unassigned YES unset up up
GigabitEthernet0/5 unassigned YES unset up up
GigabitEthernet0/6 unassigned YES unset down down
GigabitEthernet0/7 unassigned YES unset down down
GigabitEthernet0/8 unassigned YES unset down down
GigabitEthernet0/9 unassigned YES unset up up
GigabitEthernet0/10 unassigned YES unset down down
GigabitEthernet0/11 unassigned YES unset up up
GigabitEthernet0/12 unassigned YES unset down down
GigabitEthernet0/13 unassigned YES unset up up
GigabitEthernet0/14 unassigned YES unset down down
GigabitEthernet0/15 unassigned YES unset up up
GigabitEthernet0/16 unassigned YES unset up up
GigabitEthernet0/17 unassigned YES unset down down
GigabitEthernet0/18 unassigned YES unset down down
GigabitEthernet0/19 unassigned YES unset down down
GigabitEthernet0/20 unassigned YES unset up up
GigabitEthernet0/21 unassigned YES unset up up
GigabitEthernet0/22 unassigned YES unset up up
GigabitEthernet0/23 unassigned YES unset up up
GigabitEthernet0/24 unassigned YES unset up up
GigabitEthernet0/25 unassigned YES unset down down
GigabitEthernet0/26 unassigned YES unset down down
GigabitEthernet0/27 unassigned YES unset down down
GigabitEthernet0/28 unassigned YES unset down down
Bluetooth0 unassigned YES unset administratively down down

-------------------------------------
Drottningatan_22_C2960_193.65#show inte status

Port Name Status Vlan Duplex Speed Type
Gi0/1 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/2 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/3 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/4 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/5 connected 153 a-full a-100 10/100/1000BaseTX
Gi0/6 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/7 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/8 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/9 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/10 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/11 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/12 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/13 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/14 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/15 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/16 connected 153 a-full a-1000 10/100/1000BaseTX
Gi0/17 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/18 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/19 notconnect 153 auto auto 10/100/1000BaseTX
Gi0/20 connected 163 a-half a-100 10/100/1000BaseTX
Gi0/21 connected 163 a-full a-100 10/100/1000BaseTX
Gi0/22 connected 163 a-full a-100 10/100/1000BaseTX
Gi0/23 connected 2206 a-full a-100 10/100/1000BaseTX
Gi0/24 Radiolink Linkarve connected trunk a-full a-1000 10/100/1000BaseTX
Gi0/25 notconnect 1 auto auto Not Present
Gi0/26 notconnect 1 auto auto Not Present
Gi0/27 notconnect 1 auto auto Not Present
Gi0/28 notconnect 1 auto auto Not Present

-------------------------------------
Drottningatan_22_C2960_193.65#show inte trunk

Port Mode Encapsulation Status Native vlan
Gi0/24 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi0/24 1-4094

Port Vlans allowed and active in management domain
Gi0/24 1,153,163,2206

Port Vlans in spanning tree forwarding state and not pruned
Gi0/24 1,153,163,2206

-------------------------------------
Drottningatan_22_C2960_193.65#traceroute 192.168.193.1
Type escape sequence to abort.
Tracing the route to 192.168.193.1
VRF info: (vrf in name/id, vrf out name/id)
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

-------------------------------------

Drottningatan_22_C2960_193.65#ping 192.168.193.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.193.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

s.hellman · ‎02-25-2021

After I did shutdown/no shutdown on interface Vlan 1 (the switch is now reachable):

-------------------------------------
.Feb 26 05:58:11.265: %LINK-5-CHANGED: Interface Vlan1, changed state to administratively down
.Feb 26 05:58:11.266: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
.Feb 26 05:58:16.832: %SYS-5-CONFIG_I: Configured from console by console
.Feb 26 05:58:52.705: %LINK-3-UPDOWN: Interface Vlan1, changed state to up
.Feb 26 05:58:52.706: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
.Feb 26 05:58:57.968: %SYS-5-CONFIG_I: Configured from console by console