From: Venkataramanaiah.R (vramanaiah@gmail.com)
Date: Sun Nov 20 2005 - 03:16:10 GMT-3
My guess is the SW1 is receiving all of them but filtering as per the
prfx list configured in there. ORF is not effective until you
configure the receive capability at R5.
-Venkat
On 11/17/05, Cisco Nuts <cisconuts@hotmail.com> wrote:
> Hi Group:I am trying to set up BGP ORF filtering b/w 2 routers.My config
> is as follow: r5#sh run | beg router bgp | address-family
> router bgp 100
> no synchronization
> bgp log-neighbor-changes
> neighbor 5.5.5.6 remote-as 65078
> no auto-summary
> !
> address-family ipv4
> neighbor 5.5.5.6 activate
> no auto-summary
> no synchronization
> network 28.119.16.0 mask 255.255.255.0
> network 28.119.17.0 mask 255.255.255.0
> network 150.5.5.0 mask 255.255.255.0
> aggregate-address 28.119.16.0 255.255.254.0
> exit-address-family
> sw1#sh run | beg router bgp | address-family
> router bgp 65078
> bgp log-neighbor-changes
> neighbor 5.5.5.5 remote-as 100
> neighbor 172.16.78.3 remote-as 65078
> !
> address-family ipv4
> neighbor 5.5.5.5 activate
> neighbor 5.5.5.5 capability orf prefix-list send
> neighbor 5.5.5.5 prefix-list FILTER in
> no neighbor 172.16.78.3 activate
> no auto-summary
> no synchronization
> exit-address-family sw1#sh ip prefix-list FILTER | b seq
> seq 5 permit 28.119.16.0/23
> sw1#bs | b N
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> State/PfxRcd5.5.5.5 4 100 65 61 2
> 0 0 00:32:48 1 sw1#sh ip bgp | beg Net
> Network Next Hop Metric LocPrf Weight Path
> *> 28.119.16.0/23 5.5.5.5 0 0 100 i
> sw1# If you notice, I have not yet configured the orf filter on R5 but
> SW1 is already filtering and only installing one route in the BGP table
> as compared to 4. Question/Clarification: Is R5 sending all the 4 routes
> but SW1 is having to actually process them before it installs only 1
> route in the BGP table? Since R5 does not have the orf filter configured.
> Thanks.
>
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