Brocade Communications Systems FastIron SX 1600, Руководство по настройке, Страница: 436 / 593

Limiting advertisement of a static BGP4 network to selected neighbors
You can control the advertisement of a static BGP4 network to BGP4 neighbors that are configured as Service Edge Devices. When this
feature is configured for a BGP4 neighbor, static BGP4 network routes that are installed in the routing table as DROP routes are not
advertised to that neighbor. When this feature is configured, the route is only advertised to identified Service Edge devices if it is installed
as a forward route, such as the routes described in these steps.
1. There is a learned route from a customer BGP4 peering.
2. There is a valid learned route from another Services Edge device as a result of a customer route present on that device.
To configure a BGP4 neighbor to limit the advertisement of Static BGP4 Network routes, enter the static-network-edge
command as shown.
device(config)# router bgp
device(config-bgp)# neighbor 10.2.3.4 static-network-edge
Syntax: [no] neighbor ip-address | peer-group-name static-network-edge
The ip-addr and peer-group-name variables indicate whether you are configuring an individual neighbor or a peer group. If you
specify a neighbor IP address, you are configuring that individual neighbor. If you specify a peer group name, you are
configuring a peer group.
Dynamic route filter update
Routing protocols use various route filters to control the distribution of routes. Route filters are used to filter routes received from and
advertised to other devices. Protocols also use route-map policies to control route redistribution from other routing protocols. In addition,
route filter policies are used to select routes to be installed in the routing tables, and used by forwarding engine to forward traffic.
There are currently 5 different types of route filters defined for use in a device:
• Access List (ACL)
• Prefix-List
• BGP4 as-path Access-list
• BGP4 community-list
• Route-map
Not every protocol uses all of these route filters. A protocol will usually use two or three filter types.
TABLE 93 Route filters used by each protocol
Protocol Route map Prefix list Community- list As-path access- list ACL
BGP4 X X BGP4 does not use
Community- List filters
directly. It does use
them indirectly through
route-map filters that
contain Community-
List filters. X X
OSPF X X X X X
RIP X X X X
RIPng X
OSPFv3 X X X X
MSDP X
MCast X
Configuring a static BGP4 network
FastIron Ethernet Switch Layer 3 Routing
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