Dell Force10 S4810P Configuration Manual page 218

Command Syntax
redistribute ospf process-id
[ match external { 1 | 2 } | match
internal ] [ metric-type { external |
internal }] [ route-map
map-name]
Enable additional paths
By default, the add-path feature is disabled.
Note: Using Multipath and Add Path simultaneously in a Route Reflector is not recommended.
Use the following command in the CONFIGURATION ROUTER BGP mode to allow multiple paths sent
to peers.
Step Command Syntax
1 bgp add-path {send |
both} path-count count
bgp add-path receive
neighbor {ipaddress|
2
peergroup name}
add-path [send |
receive| both]
path-count count
Note: The path-count parameter controls the number of paths that are advertised, not the number of
paths that are received.
Configure IP community lists
Within FTOS, you have multiple methods of manipulating routing attributes. One attribute you can
manipulate is the COMMUNITY attribute. This attribute is an optional attribute that is defined for a group
of destinations. In FTOS, you can assign a COMMUNITY attribute to BGP routers by using an IP
Community list. After you create an IP Community list, you can apply routing decisions to all routers
meeting the criteria in the IP Community list.
IETF RFC 1997 defines the COMMUNITY attribute and the pre-defined communities of INTERNET,
NO_EXPORT_SUBCONFED, NO_ADVERTISE, and NO_EXPORT. All BGP routes belong to the
INTERNET community. In the RFC, the other communities are defined as follows:
218
| Border Gateway Protocol
Command Mode
ROUTER BGP or
CONF-ROUTER_BGPv6_AF
Command Mode
CONFIG-ROUTER-BGP
CONFIG-ROUTER-BGP
Purpose
Include specific OSPF routes in IS-IS. Configure
the following parameters:
• process-id range: 1 to 65535
• match external range: 1 or 2
• match internal
• metric-type : external or internal.
• map-name: name of a configured route map.
Purpose
Allow the advertisement of multiple paths for the
same address prefix without the new paths
replacing any previous ones.
Range: 2-64
Allow the specified neighbor/peer group to send/
receive multiple path advertisements.