Riverbed SteelHead 3070-SD, User Manual

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Configuring BGP, OSPF, Static Routing, and Route Retraction on SteelHead SD | 49
Configuring BGP on SteelHead SD
You configure the conditional default-route originate attribute when you create a BGP route-map with
the use case: Default route origination in BGP for a neighbor.
For details on configuring route maps, see “Configuring route maps” on page 76 .
To configure conditional default-route originate
1. Create a a non-empty prefix list. For details, see “Creating routing IPv4 prefix lists” on page 72 .
2. Create a route map with the use case: Default route origination in BGP for a neighbor. For details,
see “Configuring route maps” on page 76 .
3. In the Route Maps list, select the route map you created.
4. Select the Match Criteria tab.
5. Under IP list, select created prefix list.
6. To define the match and set criteria, select the route map to expand the page.
7. Fill out the fields for the match and set criteria. The criteria differ according to the use case you have
chosen. For details, see “Configuring route maps” on page 76 .
8. Choose Appliances and select the appliance to expand the pane.
9. Select the BGP tab.
10. Specify an AS number in Local AS to start a BGP session. The range is from 1 to 4294967295.
11. Click the search selector and select a branch community from the list. If no branch community is
selected, the appliance receives a unique string.
12. Under BGP neighbors, click Add BGP Neighbor .
13. Fill out the BGP neighbor attributes. For details, see “Enabling BGP and configuring BGP neighbors
on SteelHead SD” on page 42 .
14. Under Default route originate, click On to distribute the default route (0.0.0.0/0) to the specified BGP
neighbor. The default setting is Off .
15. Under route map, click the search selector and select the route map you created for the use case:
Default route origination in BGP for a neighbor and click Submit .
Configuring the BGP origin-type attribute
When you configure BGP on SteelHead SD appliances, it receives multiple paths to the same destination.
The origin-type path attribute in a BGP update message that indicates the origin of the path. The origin-
type attribute enables you to select the best path for the BGP route.
SteelHead SD supports these origin-types:
• IGP - The route is interior to the AS of origination. The routes received from BGP in this session are
marked as IGP.
• EBP - Network layer reachability information (NLRI) is learned via EGP, as indicated by “e” in the BGP
table.