Hi Adam, That's great thanks.
I had just focused on the summary only part which only summarise less specific BGP routes. Nick -----Original Message----- From: Vitkovsky, Adam [mailto:[email protected]] Sent: 24 November 2011 12:20 To: Nick Ryce; [email protected] Subject: RE: IOS XR BGP Same as in Jonos use the "aggregate" cmd: 2. router bgp as-number 3. address-family { ipv4 | ipv6 } unicast 4. aggregate-address address/mask-length [ as-set ] [ as-confed-set ] [ summary-only ] [ route-policy route-policy-name ] The as-set keyword generates autonomous system set path information and community information from contributing paths. The as-confed-set keyword generates autonomous system confederation set path information from contributing paths. The summary-only keyword filters all more specific routes from updates. The route-policy route-policy-name keyword and argument specify the route policy used to set the attributes of the aggregate route. adam -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nick Ryce Sent: Thursday, November 24, 2011 11:49 AM To: [email protected] Subject: [c-nsp] IOS XR BGP Hi, I am moving from Juniper to Cisco ( IOS XR ) and am looking to emulate a certain feature ( aggregate addressing for BGP ) In Junos I can set routing-options aggregate route x.x.x.x/19 . If there is a less specific contributing route from IGP then the aggregate is announced through BGP. In BGP on IOS XR you use the network statement network x.x.x.x/19 now you need to have an exact route for this ( normally setting a static route ). This will not suit my requirements as if we lose IGP on that router I would like to stop announcing the ranges via BGP but the static route will still be there and I will theoretically blackhole traffic. Any ideas how to allow BGP to announce an aggregate route when there is less specific in IGP would be a great help. Thanks Nick ________________________________ -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender. Any offers or quotation of service are subject to formal specification. Errors and omissions excepted. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of Lumison. Finally, the recipient should check this email and any attachments for the presence of viruses. Lumison accept no liability for any damage caused by any virus transmitted by this email. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender. Any offers or quotation of service are subject to formal specification. Errors and omissions excepted. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of Lumison. Finally, the recipient should check this email and any attachments for the presence of viruses. Lumison accept no liability for any damage caused by any virus transmitted by this email. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
