Riverbed SteelHead 3070-SD, Руководство пользователя

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Configuring BGP and OSPF Routing Policies on SteelHead SD | 75
Creating routing AS path lists
2. Click Add AS Path List to expand the page.
Figure 8-7. Creating an AS path list
3. Enter a descriptive name for the AS path list.
4. Click the search selector for a list of AS list options. Enter one or more AS numbers from 1 to
4294967295. Separate multiple numbers with a space.
– Anything - Specifies the BGP expression “.*”, which matches anything. The “.*” matches any
single character (“.”), and then finds zero or more instances of that single character (“*”).
– Learned from AS - Enter one or more AS numbers from 1 to 4294967295 and click Submit .
Separate multiple numbers with a space.
– Locally originated routes - Specifies the BGP expression: “^$”, which matches locally originated
routes. “^$” means that the string is null. Within the scope of BGP, the only time that the AS path
is null is when you are looking at a route within your own AS that you or one of your iBGP peers
has originated.
– Originated in AS - Enter one or more AS numbers from 1 to 4294967295. Separate multiple
numbers with a space and click Submit .
– Any instance of AS - Enter one or more AS numbers from 1 to 4294967295. Separate multiple
numbers with a space and click Submit .
– Directly connected to AS - Specifies the BGP expression “^[0-9]+$”, which matches all routes
originated in any directly connected single AS. These are the routes directly originated by the
peers of your AS.
5. Click Submit .
6. To edit an AS path list, select the list in the AS Path page, edit the expressions, and click Submit .
Figure 8-8. Editing an AS path list
Tip: Click Actions to delete a list.