Specifications

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Cisco Internet Streamer CDS 2.0-2.3 Software Configuration Guide
OL-13493-04
Appendix E CLI Commands
Configuring Standby Interfaces
Tip If an interface belongs to more than one standby group, you can configure the interface with a
different priority in each standby group for better load balancing. For example, interfaces FE 0/0 and
FE 0/1 are both in standby group 1 and in standby group 2. If you configure FE 0/0 with the highest
priority in standby group 1 and configure FE 0/1 with the highest priority in standby group 2, standby
group 1 will use FE 0/0 as the active interface, while standby group 2 will use FE 0/1 as the active
interface. This configuration allows each interface to back up the other one, if one of them fails.
Use the interface standby global configuration command to create standby groups on Service Engines.
Note Unlike port channels, standby groups do not support IP ACLs at a group level. However, you can
configure a member interface of a standby group to support an IP ACL at the interface level. For
example, you can individually configure the two member interfaces of Standby Group 1 (the Fast
Ethernet slot 0/port 0 interface and the Fast Ethernet slot 0/port 1 interface) to support an IP ACL named
ACL1 but you cannot configure the Standby Group 1 to support ACL1.
To configure an interface to be a backup for another interface, use the standby interface configuration
command. To restore the default configuration of the interface, use the no form of this command.
standby group_number {description text | errors max-errors | ip ip-address netmask | priority
piority_level | shutdown}
no standby group_number {description text | errors max-errors | ip ip-address netmask | priority
priority_level | shutdown}
Syntax Description group_number Standby group number (1–4).
description (Optional) Sets the description for the specified interface.
text Description for the specified interface. The maximum length of the description text
is 240 characters.
errors Sets the maximum number of errors allowed on the active interface before the
interface is shut down and the standby interface is brought up. This option is
disabled by default.
max-errors Maximum number of errors (o-4294967295).
ip Sets the IP address for the specified standby group (Standby Group 1, 2, 3, or 4).
ip-address IP address of the specified standby group (Standby Group 1, 2, 3, or 4). The group
IP address and netmask of a standby group must be configured on all of the member
interfaces.
netmask Netmask of the specified standby group (Standby Group 1, 2, 3, or 4).
priority Sets the priority of the member interface within a standby group. The priority of a
member interface can be changed at run time. The member interface that has the
highest priority after this change becomes the new active interface (the default
action is to preempt the currently active interface if an interface with higher priority
exists).