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Configuration Command Summary Lists referenced in Step 2 (prefix, IPv4 ACL, AS path, and community) first must be created separately before they can be used within the route map for filtering. Refer to Route Map on page 23 for additional information on route maps and related commands used to filter routes and apply attributes. Table 8. Defining a Community Policy Command Description Step 1 (config)#ip community-list Creates a community list for a BGP route map to use. The communities defined in this command should match an existing community string that the AOS device is receiving. Step 2 (config-comm-list)#[permit | deny] [ | internet | local-as | no-advertise | no-export] Step 3 Step 4 Step 5 (config-comm-list)#exit (config)#route-map [deny | permit] (config-route-map)#match community [exact-match] Adds an entry to the community list that either permits or denies BGP routes containing the specified community string in the community attribute. Exits the Community List Configuration mode. Creates a route map, if one does not already exist, to reference the community list. References the of the community list created in Step 1 to add it to the route map entry. The exact-match keyword is optional and specifies that the route map must match all configured community strings in the specified list exactly. Use set commands to configure any policies to be applied to the community. (config-route-map)#set as-path prepend [last-as] (config-route-map)#set metric (config-route-map)#set local-preference Prepends AS hops to the selected route(s). The last-as keyword is optional and specifies to repeat the last AS in a route up to 10 times. Specifies a MULTI_EXIT_DISC value for the selected route(s).Range is 0 to 4294967295. Changes the LOCAL_PREF value for selected route(s). Range is 0 to 4294967295. Step 6 (config-route-map)#exit Exits Route Map Configuration mode. Step 7 (config)#router bgp Enters BGP Configuration mode.Range is 1 to 4294967295. 62 Copyright © 2012 ADTRAN, Inc. 61200860L1-29.4E
Configuration Command Summary Step 8 (config-bgp)#neighbor Enters BGP Neighbor Configuration mode for the neighbor to which the route map is to be applied. Step 9 Table 8. Defining a Community Policy (Continued) Command (config-bgp-neighbor)#send-community standard Description Enables this AOS device to accept a community attribute or adds a community attribute to any advertisement sent by this peer. Step 10 (config-bgp-neighbor)#route-map in Applies the route map to the BGP neighbor as an inbound policy. Step 11 (config-bgp-neighbor)#do write Saves the configuration. Refer to BGP Communities on page 13 for additional configuration options and more detailed information on the BGP community commands listed in Table on page 62. 61200860L1-29.4E Copyright © 2012 ADTRAN, Inc. 63
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BGP Overview By defining autonomous
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BGP Overview Multi-Exit Discriminat
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BGP Overview For example, in Figure
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Basic BGP Configuration Using the C
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Page 67 and 68: Troubleshooting Table 11. Viewing B
Page 69 and 70: Troubleshooting Use the show ip bgp
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Page 81 and 82: Troubleshooting Criteria for select
Page 83 and 84: Appendix Appendix AS Regular Expres
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