User manual

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

78-12569-16

Caveats

Router(config-module-csm)# vlan 10 client

Router(config-slb-vlan-client)# route 10.0.0.0 255.255.255.0 gateway 1.1.1.1

For load balancing to function properly, all traffic arriving from the 10.0.0.0/24 subnet must

reach the CSM through VLAN 10.

Resolved Caveats in Release 2.2(2)

This section describes caveats that have been resolved in CSM software release 2.2(2).

• CSCdx20633

DNS probe functionality has changed slightly.

–

If an address has not been configured, then any non-error DNS response is considered healthy.

–

If addresses have been configured, the DNS server must respond definitively with one of the

configured addresses to consider the server healthy.

• CSCdx16058

The system fails when processing certain types of RTSP traffic.

• CSCdx16156

The CSM does not forward to an HSRP router address without a gateway command. This issue exists

in the following CSM releases: 1.x, 2.1(1), 2.1(2), 2.2(1). This caveat is fixed in all other CSM

releases, such as 2.1(3) and 2.2(2).

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

HSRP protocol signalling in order to properly learn the HSRP virtual MAC address, for example the

HSRP MAC address shared between the active and standby HSRP routers.

To allow the CSM to learn the HSRP virtual MAC address for an HSRP virtual router IP address,

you must explicitly configure the HSRP virtual router IP address as a gateway in the VLAN

submode under the module csm mod_num command. If you configure a route command pointing to

the HSRP gateway, the CSM does not properly learn the HSRP information.

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

occur:

–

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

–

The CSM sends frames to the physical MAC address on the active HSRP router, not the HSRP

virtual MAC address.

–

Connections may take an unusually long time to be replicated from the active to the standby

CSM if connection redundancy is enabled between two CSMs.

Workaround: Configure the HSRP router using the gateway command, not the route command.

• CSCdx10302

The system fails when more than 8K real servers are configured.

Workaround: Do not configure more than 8K real servers.