Product guide

Router Redundancy Using XRRP
Overview of XRRP Operation
Enabling Infinite Fail-Back in a Protection Domain
As described in the chapter titled “Router Redundancy Using XRRP” in the
Advanced Traffic Management Guide for your router, both router peers in a
protection domain must have identical network access so that each can get
to all the same subnets and the same end nodes without going through each
other.
1. Before enabling infinite fail-back, configure XRRP on both routers in the
protection domain. (Refer to the chapter mentioned in the above para-
graph.)
2. Configure infinite failback on both routers in the domain.
Syntax: [no] xrrp inf-failback
Enables or disables infinite fail-back on a router running
XRRP. In a given protection domain, infinite fail-back must
be individually enabled on both XRRP routers to provide full
fail-back control. For information on configuring general
XRRP operation, refer to the chapter titled “Router Redun-
dancy Using XRRP” in the Advanced Traffic Management
Guide for your Series 5300xl router. (Default: Disabled)
3. Enable XRRP operation in the protection domain by executing the xrrp
command in the CLI of both routers.
Initiating a Fail-Back When Infinite Fail-Back Is Enabled
Syntax: xrrp ctrl-transfer
In a protection domain where infinite fail-back has already
been enabled, this command enables a system operator to
manually initiate fail-back where the fail-over router has
already regained access to all of its XRRP VLANs. Successful
execution of this command leaves both routers in a protection
domain with primary control of their configured XRRP
VLANs. The command can be executed in the CLI of either
router. Note that if the fail-over router has not regained access
to all of its XRRP VLANs, the fail-back is blocked and the fail-
back router continues to maintain permanent control of all
XRRP VLANs in the domain.
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