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Features in 291-05 58
Version 291-10
C613-10488-00 REV G
CR00016758
IP NAT - This enhancement enables you to turn off TCP state and sequence checking in IP
NAT. It also allows all ICMP packets go through IP NAT.
To do this, use the command:
enable ip nat bypasstcp
When bypasstcp is enabled, IP NAT performs IP address and port translation for
TCP packets and forwards the packets, regardless of the TCP sequence number
and the current TCP state. It also allows ICMP echo reply and other ICMP packets
to initiate a session and get forwarded.
To disable the bypassing, use the command:
disable ip nat bypasstcp
Bypassing is disabled by default because it degrades the security of IP NAT.
However, it is useful when you need NAT on VRRP routers.
Note that this enhancement does not apply to firewall NAT.
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CR00016776
IP Gateway - This enhancement allows ARPs to move between ports on the router’s VLAN
interfaces.This assists with wireless station roaming.
To enable this feature, use the command:
enable ip arp silentroam
To disable it, use the command:
disable ip arp silentroam
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CR00016785
Core - The default summertime dates have been updated to reflect the changes for
North America made by the American Energy Policy Act of 2005.
By default, summertime now starts on the second Sunday in March and ends on
the first Sunday in November.
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CR00016977
Script - This enhancement enables you to use aliases in commands in script files. The
router or switch expands the aliases when it runs the script (except when it runs
the script at start-up).
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CR Module Level Description
AR400
AR7x5
AR7x0S
Rapier i
AT-8800
AT-8600
AT-8700XL
x900-48
AT- 9900
AT-9800