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New Member

Switchport dies after host drops and comes back online

We are running a 4507R SupII+ switch with WS-X4548-GB host modules. After a host reloads and comes back online, the switchport dies. Attempting to shut/no shut the port, the following message is logged:

Aug 15 15:32:14.164 UTC: %C4K_SWITCHMANAGER-4-S2WERRORREPORT: PimEthAutoNeg: S2w Read/Write Error for port Gi4/25.

This happens on all switchports within this module only. The only way to recover the port is to disable inline power with the power inline never command. I have searched for a bug in this version 12.2(25)EWA4 relating to this and have found nothing.

Should I be suspecting a switch module failure?

6 REPLIES
New Member

Re: Switchport dies after host drops and comes back online

I've had a similiar situation but ports were connected to routers. Mine is also 4507R w/ Sup V 10GE with WS-X4548-GB. The only way the ports would come back up was to set the speed to 100.

I came to a conclusion that since CAT-5 cable pin outs are different for 1000 and 10/100 (1000 also uses pins 4578) it couldn't auto negotiate thus the port remained down until I configured the port speed to 100.

This seems like a software bug.

John

New Member

Re: Switchport dies after host drops and comes back online

John...thanks for the reply.

I did locate a bug that documented a similar issue with 12.2(20) code. Bug ID CSCef87815 but I'm running 12.2(25).....

Silver

Re: Switchport dies after host drops and comes back online

Since it seems like the problem is with autonegotiation, workaround would be to manually set speed and duplex, as suggested.

New Member

Re: Switchport dies after host drops and comes back online

Tried that initially with no resolve. The "inline power never" is the trick.

New Member

Re: Switchport dies after host drops and comes back online

Hi, here's what cisco says:

""""""

C4K_SWITCHMANAGER-4-S2WERRORREPORT and POE doesnot function

This DDTS is basically a hardware issue that has been resolved by some

rework of the linecards.

Regarding to WS-X4548-GB-RJ45V, linecards with hw rev >= 2.2 are NOT

affected.

There is no software fix and affected cards should be replaced.

""""""

Can you post a "sh mod" of your switch?

Darko

New Member

Re: Switchport dies after host drops and comes back online

Chassis Type : WS-C4507R

Power consumed by backplane : 40 Watts

Mod Ports Card Type Model Serial No.

---+-----+--------------------------------------+------------------+-----------

1 2 Supervisor II+ 1000BaseX (GBIC) WS-X4013+ JAE1043E867

3 48 10/100/1000BaseT (RJ45)V, Cisco/IEEE WS-X4548-GB-RJ45V JAE1043E8BK

4 48 10/100/1000BaseT (RJ45)V, Cisco/IEEE WS-X4548-GB-RJ45V JAE1048FXA2

6 48 10/100/1000BaseT (RJ45)V, Cisco/IEEE WS-X4548-GB-RJ45V JAE1120HP4S

M MAC addresses Hw Fw Sw Status

--+--------------------------------+---+------------+----------------+---------

1 0019.aa4e.f6c0 to 0019.aa4e.f6c1 4.2 12.2(20r)EW1 12.2(25)EWA4 Ok

3 0019.e788.27f0 to 0019.e788.281f 3.1 Ok

4 001a.2f36.e200 to 001a.2f36.e22f 3.1 Ok

6 001b.d400.acb0 to 001b.d400.acdf 3.3 Ok

Mod Redundancy role Redundancy mode Redundancy status

----+-------------------+-------------------+-------------------

1 Active Supervisor Non redundant Active

Card 4 has the issue

Card 3 seems unaffected

Card 6 is a planned replacement of card 4 which is also unaffected.

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