Ethernet Switches & Routers

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New Contributor
Posts: 2
Registered: ‎02-28-2011

CAM Failure on RX16

Hi All,

Does anyone know what this message means?:

Aug 23 07:07:13:I:Interface ethernet13/1, state down - CAM failure
Aug 23 07:07:12:E:System: LP13/TM1 has shutdown (ALARM:LP13/NP1 TCAM failure (shutdown))

It stopped all traffic on the 4 port Optical 10G card. A reboot of the RX16 switch brought it back to life.

Is the card failing?

Thanks,

-Scott

Super Contributor
Posts: 445
Registered: ‎04-08-2009

Re: CAM Failure on RX16

Hi scott4.  I personally would recommend calling TAC/support just to be on the safe side.  It's impossible to diagnose from the two lines, but does provide info to warrant further investigation. 

Regards,

Mike Eversole
Brocade Community Manager
Super Contributor
Posts: 1,087
Registered: ‎12-13-2009

Re: CAM Failure on RX16

Hi Scott4,

     I agree with Mike - Best to check with the TAC.

However I am guessing that you have run out of TCAM space for that Traffic Manager (TM1 on slot 13). There should be a bunch of "show CAM" commands to see available space (would have been good to see the results of these before the reboot).

You can also resize the TCAM on the RX - see below from the manual.

CAM Partitioning for the BigIron RX

In releases prior to 02.3.00, CAM partitioning was not configurable. Starting in BigIron RX software release 02.3.00, you can specify the percentage of CAM assigned to each of the CAM entry types globally. CAM Partitioning is not required on the BigIron RX. The default CAM allocations are described in the following:

Resource limitation for BigIron RX hardware: MAC 16K and 512K IPv4 routes and 64K IPv6 routes

  1. simultaneously.

The number of CAM entries available for ACL, PBR, RL: 1024 Default values:

  • ACL – 416
  • Rate Limiting – 416 (Shared with PBR)

Other Default number of entries available:

IPv6 Multicast – 192

Re-distributing CAM Allocations

Depending on the needs of you network, the CAM allocations may need to be re-distributed. There are two steps to the command.

  1. 1. Change the allocation used between the rules + PBR/RL and the IPv6 multicast entries.
  2. 2. Change the allocation of the ACL rules and the PBR/RL entries.

The total amount of CAM entries available is 1024 for each packet processor. If you want to configure 600 for ACLs, 168 for PBR and Rate Limiters, and 256 for IPv6 multicast forwarding entries, enter commands such as the following:

BigIron RX(config)#cam-partition rw session 768

BigIron RX(config)#cam-partition rw session rule-partition 600

If you want to configure 2 ACL entries and 2 IPv6 entries and 1020 Rate Limiting entries, enter a command such as the following:

BigIron RX(config)#cam-partition rw session 1022

BigIron RX(config)#cam-partition rw session rule-partition 2

Syntax: cam-partition rw session <count>

Syntax: cam-partition rw session rule-partition <count>

The "cam-partition rw session xx" command allocates xx entries of the 1024 entries to ACLs+(RL/QoS/PBR) and

1024-xx to the IPv6 multicast entries.

The "cam-partition rw session rule-partition yy" command gives the yy of xx entries to ACLs and xx-yy entries to RL/QoS/PBR entries.

NOTE: A reload is required after a CAM partition command is configured for the CAM partition to take effect.

Thanks

Michael.

New Contributor
Posts: 2
Registered: ‎02-28-2011

Re: CAM Failure on RX16

Thanks for your replies. Looks like the card has failed. After we rebooted the switch it did it again(tried twice) so we migrated the four ports to a different card and all is well. I'm guessing that the memory for the TCAM has failed.

Thanks again,

-Scott

Super Contributor
Posts: 1,087
Registered: ‎12-13-2009

Re: CAM Failure on RX16

Thanks for the update Scott.

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