Cisco GRS User Manual

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XLAT Instance Configuration
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IPv4 ServiceApp name
◦
Service App on which IPv4 traffic enters/leaves
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IPv6 ServiceApp name
◦
Service App on which IPv6 traffic enters/leaves
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XLAT prefix
◦
IPv6 prefix corresponding to XLAT translation
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Ubit enabled/disabled
◦
whether bits 64..71 are reserved or can be used for xlat purposes
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IPv4 & IPv6 TCP MSS configuration
◦ IPv4 TCP traffic’s MSS value will be set to the smaller of (incoming MSS value)
◦ IPv6 TCP traffic’s MSS value will be set to the smaller of (incoming MSS value)
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Traceroute pool
◦
Non Translatable IPv6 source addresses are translated to the IPv4 addresses in this range using a
hash mechanism
◦
Algorithm to chose IPv4 address from traceroute pool
TTL based – Chose address based on hop count of the pkt
Hash based – Hash IPv6 Source Address and use it for selection
Random – Randomly select an IPv4 address
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IPv4 TOS Setting
◦
By default IPv4 TOS field is copied from IPv6 Traffic Class field
◦
This value can be overridden based on the configured TOS value
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IPv6 Traffic Class Setting
◦
By default IPv6 Traffic Class field is copied from IPv4 TOS field
◦
This value can be overridden based on the configured Traffic Class value
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IPv4 DF override
◦
When translating a IPv6 packet when the no Fragment Header IPv4 DF bit is set to 1.
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
70 OL-32659-01
Implementing Carrier Grade NAT on Cisco IOS XR Software
Configuring IPv4/IPv6 Stateless Translator (XLAT)

Cisco GRS Specifications

General

Brand	Cisco
Model	GRS
Category	Network Router
Language	English