Chapter 2 Content Switching Module with SSL Commands

alias (VLAN submode)

alias (VLAN submode)

Syntax Description

Defaults

Command Modes

Command History

To assign multiple IP addresses to the CSM, use the alias command in the SLB VLAN configuration submode.To remove an alias IP addresses from the configuration, use the no form of this command.

alias ip-address netmask

no alias ip-address netmask

ip-address

Alias IP address; a maximum of 255 addresses are allowed per

 

VLAN.

 

 

netmask

Network mask.

 

 

This command has no default settings.

SLB VLAN configuration submode

Release

Modification

CSM release 1.1(1)

This command was introduced for server VLANs.

 

 

CSM release 2.1(1)

This command is now available for both client and server VLANs.

 

 

CSM-S release 1.1(1)

This command was introduced.

 

 

Usage Guidelines This command allows you to place the CSM on a different IP network than real servers without using a router.

If the ICMP protocol does not terminate, you may need to set the idle timeout of these connections. The alias IP address in the CSM serves three purposes:

It is a shared next hop (gateway) for two CSMs in the redundant configuration. The servers should point to the alias as the default gateway. The Route Health Injection (RHI) service would be using the alias IP address as the next hop when inserting a route.

If ping is destined to the alias IP address, the CSM sends the reply back to the source MAC. This reply is useful when performing an ICMP probe from one CSM, across a firewall farm, to the other CSM alias address.

In the Global Server Load Balancing (GSLB) configuration, the alias IP address is the destination VIP for the DNS request.

Examples

This example shows how to assign multiple IP addresses to the CSM:

 

 

Cat6k-2(config-slb-vlan-server)# alias 130.21.34.56 255.255.255.0

 

 

Cat6k-2(config-slb-vlan-server)# alias 130.22.35.57 255.255.255.0

 

 

Cat6k-2(config-slb-vlan-server)# alias 130.23.36.58 255.255.255.0

 

 

Cat6k-2(config-slb-vlan-server)# alias 130.24.37.59 255.255.255.0

 

 

Cat6k-2(config-slb-vlan-server)# alias 130.25.38.60 255.255.255.0

 

 

Catalyst 6500 Series Switch Content Switching Module with SSL Command Reference

 

 

 

 

 

 

 

 

 

 

 

 

OL-7029-01

 

 

2-189

 

 

 

 

 

Page 211
Image 211
Cisco Systems OL-7029-01 manual Alias Vlan submode, Alias ip-address netmask No alias ip-address netmask, Netmask, 189