Users Guide

Redistributing Routes
In addition to filtering routes, you can add routes from other routing instances or protocols to the BGP process. With the redistribute
command, you can include ISIS, OSPF, static, or directly connected routes in the BGP process.
To add routes from other routing instances or protocols, use any of the following commands in ROUTER BGP mode.
• Include, directly connected or user-configured (static) routes in BGP.
ROUTER BGP or CONF-ROUTER_BGPv6_ AF mode
redistribute {connected | static} [route-map map-name]
Configure the map-name parameter to specify the name of a configured route map.
• Include specific ISIS routes in BGP.
ROUTER BGP or CONF-ROUTER_BGPv6_ AF mode
redistribute isis [level-1 | level-1-2 | level-2] [metric value] [route-map map-name]
Configure the following parameters:
○ level-1, level-1-2, or level-2: Assign all redistributed routes to a level. The default is level-2.
○ metric value: The value is from 0 to 16777215. The default is 0.
○ map-name: name of a configured route map.
• Include specific OSPF routes in IS-IS.
ROUTER BGP or CONF-ROUTER_BGPv6_ AF mode
redistribute ospf process-id [match external {1 | 2} | match internal] [metric-type {external
| internal}] [route-map map-name]
Configure the following parameters:
○ process-id: the range is from 1 to 65535.
○ match external: the range is from 1 or 2.
○ match internal
○ metric-type: external or internal.
○ map-name: name of a configured route map.
Enabling Additional Paths
The add-path feature is disabled by default.
NOTE: Dell Networking OS recommends
not using multipath and add path simultaneously in a route reflector.
To allow multiple paths sent to peers, use the following commands.
1. Allow the advertisement of multiple paths for the same address prefix without the new paths replacing any previous ones.
CONFIG-ROUTER-BGP mode
bgp add-path [both|received|send] path-count count
The range is from 2 to 64.
2. Allow the specified neighbor/peer group to send/ receive multiple path advertisements.
CONFIG-ROUTER-BGP mode
neighbor add-path
NOTE:
The path-count parameter controls the number of paths that are advertised, not the number of paths that are
received.
Configuring IP Community Lists
Within Dell Networking OS, 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 Dell Networking OS, 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.
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Border Gateway Protocol IPv4 (BGPv4)