Cannot ping SVI after power outage

[jbritto76]

After a power outage we are unable to ping our SVI. The vlans are showing up and up but I have no connectivity. The vlans that we cannot connect to are phone and camera vlans. The only solution I have found is going into the core switch for the site and shut/no shut all the problem vlans and the issue is resolved. 

Has anyone ever had this issue if so how did you resolve?

[Georg Pauwen]

Hello,

could be a bug - which platform and IOS are you running ?

[jbritto76]

Here is the version:

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICESK9-M), Version 12.2(54)SG1, RELEASE SOFTWARE (fc1)

[Georg Pauwen]

Hello,

I checked for bugs but couldn't find any. Is the core switch the root for those two Vlans ? Can you post he output of 'show spanning-tree vlan x' where 'x' is the Vlan number ?

[Ton V Engelen]

HI

after the outtage, did you do reload? 

I ve seen very strange things happening at l3 after outtages. 

A reload usually fixes these issues. 

[jbritto76]

Yea I see the Core switch is not the root bridge for these VLAN's

VLAN0200
Spanning tree enabled protocol ieee
Root ID Priority 32968
Address 30e4.db3f.c700
Cost 2
Port 1 (TenGigabitEthernet1/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32968 (priority 32768 sys-id-ext 200)
Address c89c.1d71.c900
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec

Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Te1/1 Root FWD 2 128.1 P2p
Te1/3 Desg FWD 2 128.3 P2p
Te1/4 Desg FWD 2 128.4 P2p
Te1/5 Desg FWD 2 128.5 P2p
Te1/6 Desg FWD 2 128.6 P2p
Te1/7 Desg FWD 2 128.7 P2p
Te1/8 Desg FWD 2 128.8 P2p
Te3/1 Desg FWD 2 128.129 P2p
Te3/2 Desg FWD 2 128.130 P2p
Gi3/20 Desg FWD 4 128.148 P2p

sh spanning-tree vlan 230

VLAN0230
Spanning tree enabled protocol ieee
Root ID Priority 32998
Address 30e4.db28.f880
Cost 2
Port 3 (TenGigabitEthernet1/3)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32998 (priority 32768 sys-id-ext 230)
Address c89c.1d71.c900
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec

Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Te1/1 Desg FWD 2 128.1 P2p
Te1/3 Root FWD 2 128.3 P2p
Te1/4 Desg FWD 2 128.4 P2p
Te1/5 Desg FWD 2 128.5 P2p
Te1/6 Desg FWD 2 128.6 P2p
Te1/7 Desg FWD 2 128.7 P2p
Te1/8 Desg FWD 2 128.8 P2p
Te3/1 Desg FWD 2 128.129 P2p
Te3/2 Desg FWD 2 128.130 P2p
Gi3/20 Desg FWD 4 128.148 P2p

[paul driver · Accepted solution]

Hello

So the first thing to do is to set the core switch as the stp root for the entire network, I would suggest using a stp priority value instead of the marco root primary command.

spanning-tree vlan 1-4096 priority  0 <--4096 is only needed if you have extended vlans over 1004
(enabled by spanning-tree extended-id)

Also I encountered a similar issue on a 4500x vss core regarding the L3 svi not being able to route correctly and the only way I could get this back up and running was indeed to shutdown and re enable the effected L3 interfaces - it turned out in my case to be this bug , So eventually I had to upgrade the ios.

res
Paul