Specifications

Features in 291-16 24
Version 291-18
C613-10488-00 REV Q
CR00021262 IPsec - This enhancement has improved router or switch performance when:
■ multiple IPsec policies exist. In particular, having two policies causes
much less of a reduction in performance.
■ a single channel exists with bidirectional traffic (i.e. the single channel is
both encoding and decoding packets).
Some improvements for this situation were made in 291-15. This version
contains further improvements.
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CR00021769 SNMP - A new command set snmp trapdelay has been added to allow SNMP
traps to be queued for a specified time at start up.
By default, all SNMP traps are queued for 10 seconds following startup.
This allows time for links to come up on the router or switch. However
sometimes this is not enough time for other network protocols to converge
and open up transmission paths to the SNMP management station.
The set snmp trapdelay command allows you configure a longer delay of
up to 10 minutes on an SNMP trap. To change the delay, use the command:
SET SNMP TRapdelay=10..600
The default is 10 seconds.
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CR00021852 EPSR - An enhancement has been made to EPSR to speed up recovery time in
situations where the Master switch is isolated or down. In these situations,
if any links between transit nodes go down and are restored, the transit
nodes are now able to put the recovered ports back into a forwarding state
even without messaging from the Master switch. This means that
connectivity around the ring can be partially restored before
communication with the Master has been restored.
The mechanism by which the transit nodes make this decision operates in
a way that prevents the possibility of the ring ever becoming unprotected.
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CR Module Level Description
AR44x / AR450 AR7x5 AR750S / AR770S Rapier i Rapier w AT-8800 AT-8600 AT-8700XL AT-8948 / x900-48 AT-9900 AT-9800