Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 400)

382 Multi-Service IronWare Administration Guide
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Global and Address Family Configuration Levels
B
To configure BGP4 and IPv4 MBGP, enter the router bgp command, which takes you to the BGP
router configuration level. At this level, you can access commands to configure all aspects of BGP4
and IPv4 MBGP, including commands that configure the protocol, and commands that configure
unicast routes and multicast routes. (To configure aspects of multicast routes, specify the nlri
keyword with a command.)
To configure IPv4 IS-IS, enter the router isis command, which takes you to the IS-IS device
configuration level. At this level, you can access commands that allow you to configure all aspects
of IPv4 IS-IS, including commands that configure the protocol, and commands that configure
unicast routes.
In both cases, the device determines, for example, whether commands entered at the BGP device
configuration level apply to BGP4, to BGP4 unicast routes, or to IPv4 MBGP routes.
The introduction of IPv6 required the restructuring of existing BGP4 and IPv4 IS-IS CLI for the
following reasons:
• To accommodate the IPv6-related CLI.
• To simplify the configuration of BGP4 unicast and IPv4 MBGP routes.
The CLI includes two layers of CLI for BGP and IS-IS (refer to Figure 19 ):
• A global layer to configure BGP and IS-IS protocols.
• Address families that separate the configuration of:
- IPv6 and IPv4
- Routing protocol
Sub-address families separate the configuration of:
- Unicast routes
- Multicast routes
FIGURE 19 IPv4, BGP4+ and IS-IS CLI structures