User manual

Release Notes for Catalyst 6500 Series Content Switching Module Software Release 2.2(8)

78-12569-16

Caveats

• CSCdw49073

The CSM does not support creating more than 127 virtual servers with the same virtual IP (VIP)

address, even though the CLI does enable you to configure more than 127 virtual servers. If you use

the CLI to configure more than 127 virtual servers, the 128th and subsequent virtual servers will not

function properly.

Workaround: Do not configure more than 127 virtual servers on the same VIP.

• CSCdy09047

A real server on which multiple health probes are configured will be considered to be healthy when

one probe recovers, regardless of the state of other health probes on that server. This is undesirable,

since one or more of these other probes may indicate that the server is still unhealthy. Instead, the

real server should be considered healthy only when all probes on that server are successful.

Workaround: None.

• CSCdy19222

There is a limit of two configured HSRP routers per CSM. Routes configured with the route or

gateway command in the CSM VLAN submode may point to HSRP routers as the next-hop address.

Because the CSM interoperates with HSRP, the set of all IP addresses configured as next-hops in

route or gateway commands cannot contain more than two HSRP IP addresses. That is, a single

CSM can interoperate with only two HSRP IP addresses at any given time.

Workaround: Do not configure routes on the CSM to point to more than two distinct HSRP

addresses.

Resolved Caveats in Software Release 2.1(4)

This section describes caveats that have been resolved in CSM software release 2.1(4).

• CSCdx16168

Due to internal optimizations that improve overall network throughput, the CSM must listen to the

HSRP protocol signalling to properly learn the HSRP virtual MAC address that is shared between

the active and standby HSRP routers.

The caveat is that the HSRP learning code in the CSM assumes that any given HSRP group appears

on only one VLAN. If the same HSRP group appears on two different VLANs, the HSRP virtual

MAC for the group is learned for only one of these VLANs.

If the CSM does not properly learn the HSRP virtual MAC address, the following symptoms may

occur:

–

Connections are dropped when coming from the HSRP router through the CSM.

–

The CSM sends frames to the active HSRP router's physical MAC address, not the HSRP virtual

MAC address.

–

If connection redundancy is enabled between two CSMs, connections may take an unusually

long time to be replicated from the active to the standby CSM.

Workaround: Change HSRP group numbers to be globally unique.

• CSCdx44970

The CSM is dropping packets generated by intermediate routers directed behind the CSM and

generates the following error:

ICMP Can't Fragment Error (type 3, code 4)