Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 402)

384 Multi-Service IronWare Administration Guide
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Backward compatibility for existing BGP4 and IPv4 IS-IS configurations
B
When you enter the exit-address-family command at an address family configuration level you
return to the global IS-IS configuration level, or the BGP4 unicast address family configuration level,
(the default BGP4 level). For backward compatibility, you can currently access commands related
to BGP4 unicast routes at both global BGP4 configuration and BGP4 unicast address family
configuration levels. Both levels are indicated by the (config-bgp)# prompt.
Backward compatibility for existing BGP4 and
IPv4 IS-IS configurations
When a device is upgraded to the current software version, the software automatically converts the
existing BGP4 unicast and all IPv4 IS-IS configurations into the new address families. The software
also automatically converts some of the IPv4 MBGP configuration into the new address family.
Software conversion actions include:
• Leaves the global BGP4 and IPv4 IS-IS configurations as is.
• Converts the configuration for BGP4 unicast neighbors and routes into the BGP4 unicast
address family.
• Converts the configuration for IPv4 IS-IS unicast routes into the IPv4 IS-IS unicast address
family.
• Converts the configuration for IPv4 MBGP neighbors into IPv4 MBGP address family.
NOTE
The software does not convert all aspects of the IPv4 MBGP configuration. You must reconfigure the
network routes, aggregate routes, redistribution of routes into IPv4 MBGP, and route map filters. Use
the show run and show ip bgp config commands to check your IPv4 MBGP configuration.
Previously, IPv4 MBGP routes were configured using commands that included the nlri keyword The
current software version does not support the nlri keyword with IPv4 and IPv6 MBGP commands.
You must now use the address families to configure all versions of BGP, IS-IS, and MBGP.
Global BGP4 commands and BGP4 unicast
route commands
A global BGP command configures the BGP routing protocol and applies to all IPv4 and IPv6
address families. You can access the global commands while at the global BGP configuration level.
A BGP4 unicast route command configures a BGP4 unicast route. For backward compatibility, you
can access BGP4 unicast route commands at both global BGP4 configuration and BGP4 unicast
address family configuration levels. To help you distinguish the global BGP4 commands from the
BGP4 unicast route commands at the global BGP4 configuration level, this section lists global BGP
commands:
• address-filter
• always-compare-med
• as-path-filter
• as-path-ignore
• bgp-redistribute-internal