Configuring The Srp Context Interface Parameters; Configuring Lz4 Compression Algorithm - Cisco ASR 5500 Administration Manual

Configuring the Service Redundancy Protocol (SRP) Context
is allowed during this stage, a call may get disconnected based on the control message type and accounting
information will be lost.
• Network Convergence – This encompasses the amount of time taken to update routes and send
control/data to the newly active chassis. Control messages are dropped during the transition.
• Accounting Flush – During this flush stage data counts are synchronized between chassis. If control
signaling is allowed during this flush, the call may get disconnected based on the control message type,
and accounting information will be lost for calls that existed before switchover.
• Audit – During audit new calls are not allowed because synchronization of call resources may result in
clearing of the calls.
The switchover control-outage-optimization CLI command allows new calls during the Accounting Flush,
as soon as the Audit is completed. This SRP Configuration mode command enables the quicker restoration
of control traffic (call-setup, modification, deletion) following an ICSR switchover.
configure
context context_name
service-redundancy-protocol
switchover control-outage-optimization
end

Configuring the SRP Context Interface Parameters

This procedure configures the communication interface with the IP address and port number within the SRP
context. This interface supports interchassis communication.
CLI commands must be executed on both chassis. Log onto both chassis before continuing. Always make
Important
configuration changes on the primary chassis first.
configure
context vpn_ctxt_name
interface srp_if_name
ip-address
exit
exit
port ethernet slot_num
description des_string
medium { auto | speed { 10 | 100 | 1000 } duplex { full | half } }
no shutdown
bind interface srp_if_name srp_ctxt_name
end

Configuring LZ4 Compression Algorithm

You can optionally enable LZ4 compression algorithm for SRP messaging payload. The zlib algorithm remains
as the default.
LZ4 is a very fast lossless compression algorithm with near-linear scalability for multi-threaded applications.
The compression keyword in the SRP Configuration mode checkpoint session command allows you to
enable the use of the LZ4 compression algorithm.
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-noconfirm
[ ]
ip_address ip_address
{ | /
port_num
/
mask
}
Interchassis Session Recovery