[c-nsp] carving TCAM on Engine 3 linecards due to exhausted IPv6 TCAM regions

[Per Carlson]

Hi.

On Fri, Feb 18, 2011 at 07:46, Jan Sandmaier <sandmaier at schlund.net> wrote:
> Hi Pelle,
>
> thanks for your good answer. I simply can't configure this. What code
> are you running? I'm running an quite old code. It seems I have to do an
> upgrade first.

We are running SY9b.

> bb-b.fra3.fra.de(config)#hw-module slot 1 tcam carve ?
>  RX_144b_REGION             RX 144b Dynamic Region
>  RX_288b_REGION             RX 288b Dynamic Region
>  RX_72b_REGION              RX 72b Dynamic Region
>  RX_BOT_144b_REGION         RX Bottom 144b Dynamic Region
>  RX_BOT_288b_REGION         RX Bottom 288b Dynamic Region
>  RX_BOT_72b_REGION          RX Bottom 72b Dynamic Region
>  RX_IPV6_MCAST_288b_REGION  RX IPv6 Mcast 288b Region
>  RX_IPv6_144b_REGION        RX IPv6 144b Region
>  RX_TOP_144b_REGION         RX TOP 144b Fixed Region
>  RX_TOP_288b_REGION         RX TOP 288b Fixed Region
>  RX_TOP_72b_REGION          RX TOP 72b Fixed Region
>  RX_TOP_NF_REGION           RX TOP NetFlow Region
>  TX_144b_REGION             TX 144b Dynamic Region
>  TX_288b_REGION             TX 288b Dynamic Region
>  TX_72b_REGION              TX 72b Dynamic Region
>  TX_BOT_144b_REGION         TX Bottom 144b Dynamic Region
>  TX_BOT_288b_REGION         TX Bottom 288b Dynamic Region
>  TX_BOT_72b_REGION          TX Bottom 72b Dynamic Region
>  TX_IPv6_144b_REGION        TX IPv6 144b Region
>  TX_TOP_144b_REGION         TX TOP 144b Fixed Region
>  TX_TOP_288b_REGION         TX TOP 288b Fixed Region
>  TX_TOP_72b_REGION          TX TOP 72b Fixed Region
>  TX_TOP_NF_REGION           TX TOP Netflow Region

When looking into it more closely, we do neither have any RX_IPV6
region to configure:

router(config)#hw-module slot 0 tcam carve ? | filter
  RX_IPV6_MCAST_288b_REGION  RX IPv6 Mcast 288b Region
  RX_IPv6_144b_REGION        RX IPv6 144b Region
  RX_TOP_NF_REGION           RX TOP NetFlow Region
  TX_IPv6_144b_REGION        TX IPv6 144b Region
  TX_TOP_NF_REGION           TX TOP Netflow Region
router(config)#

It very looks like someone have pasted the wrong commands into the Bug-Id.

*I* would assume it'e the RX_IPv6_144b_REGION that should be used
together with a 128 bit prefix, but a confirmation of a Cisco employee
on this list would be nice (poking Rodney or Oliver ;-) ).

-- 
Pelle

RFC1925, truth 11:
 Every old idea will be proposed again with a different name and
 a different presentation, regardless of whether it works.