From: Bob Rech (brech@kc.rr.com)
Date: Thu Nov 14 2002 - 19:47:26 GMT-3
The access-list you have 0.0.0.0 254.0.0.0
says match anything the last bit int the first octet =0 {or an even number
in the first octect}
it also says match exactly the 2-4 octets which are all 0
so this would match
0.0.0.0
2.0.0.0
4.0.0.0
6.0.0.0
if what you were looking for was to match all even in the first octet then
try 254.255.255.255
if what you wanted was to match the last octet then try 255.255.255.254
as long as you don't care what the other octets are.
for example if you wanted to match 200.200.<even numbers>.<don't care>
try 200.200.0.0 0.0.254.255
----- Original Message -----
From: <ccie2002@bellsouth.net>
To: <ccielab@groupstudy.com>
Sent: Thursday, November 14, 2002 1:40 PM
Subject: BGP HELP_FILTERING EVENS ROUTES
> Hello:
>
> Need a little BGP help trying to only premit even bgp routes
> to come thru. From some reason I can not get my even routes
> to come thru on my Cisco 2509 router. Can anyone advise what I might
> be doing wrong. I have two router in the same AS100 and I would like
> the Cisco2509 to recieve the even routes from the Cisco 2504.
> I did a route map but eveytime I adversite that to my neighbor
> (Cisco2504) I do not recieve "any" bgp routes from my Cisco2509.
> The goal is for the Cisco 2509 to see only even bgp routs advertised
> from the Cisco 2504.
>
> Any help would be grateful. Below are the configs
>
>
> Cisco2509#show ip bgp
> BGP table version is 9, local router ID is 200.200.4.4
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 160.7.7.0/24 150.3.47.2 0 200 300 i
> *> 160.11.1.0/24 150.3.47.2 0 200 300 i
> *> 160.12.1.0/24 150.3.47.2 0 200 300 i
> *> 160.13.1.0/24 150.3.47.2 0 200 300 i
> *> 195.6.6.0 150.3.47.2 0 200 i
> *> 195.10.2.0 150.3.47.2 0 0 200 i
> *> 200.200.3.0 0.0.0.0 0 32768 i
> *> 200.200.4.0 0.0.0.0
>
>
> router bgp 100
> no synchronization
> network 200.200.3.0
> network 200.200.4.0
> neighbor 150.3.26.6 remote-as 100
> neighbor 150.3.26.6 route-reflector-client
> neighbor 150.3.26.6 route-map EVEN in
> neighbor 150.3.47.2 remote-as 200
> !Cisco2509#show ip bgp summary
> BGP router identifier 200.200.4.4, local AS number 100
> BGP table version is 9, main routing table version 9
> 8 network entries and 8 paths using 968 bytes of memory
> 3 BGP path attribute entries using 344 bytes of memory
> BGP activity 78/70 prefixes, 133/125 paths
> 32 prefixes revised.
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
> 150.3.26.6 4 100 233 222 9 0 0 00:19:35
0
> 150.3.47.2 4 200 231 203 9 0 0 00:19:21
6
> Cisco250
>
> ip classless
> !
> access-list 10 permit 0.0.0.0 254.0.0.0
> route-map EVEN permit 10
> match ip address 10
>
>
>
>
>
>
> Cisco2504>show ip bgp sum
> BGP router identifier 150.3.4.4, local AS number 100
> BGP table version is 105, main routing table version 105
> 17 network entries and 23 paths using 2249 bytes of memory
> 4 BGP path attribute entries using 440 bytes of memory
> BGP activity 43/26 prefixes, 98/75 paths
> 0 prefixes revised.
>
> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
> 150.3.26.5 4 100 223 235 105 0 0 00:20:53
8
> 150.3.53.5 4 100 215 218 105 0 0 03:01:42
10
> Cisco250
>
>
>
> router bgp 100
> no synchronization
> network 10.10.10.0 mask 255.255.255.0
> network 11.11.11.0 mask 255.255.255.0
> network 12.12.12.0 mask 255.255.255.0
> network 13.13.13.0 mask 255.255.255.0
> network 14.14.14.0 mask 255.255.255.0
> neighbor 150.3.26.5 remote-as 100
> neighbor 150.3.26.5 route-reflector-client
> neighbor 150.3.53.5 remote-as 100
> neighbor 150.3.53.5 route-reflector-client
>
>
>
> Cisco2504>show ip bgp
> BGP table version is 105, local router ID is 150.3.4.4
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 10.10.10.0/24 0.0.0.0 0 32768 i
> *> 11.11.11.0/24 0.0.0.0 0 32768 i
> *> 12.12.12.0/24 0.0.0.0 0 32768 i
> *> 13.13.13.0/24 0.0.0.0 0 32768 i
> *> 14.14.14.0/24 0.0.0.0 0 32768 i
> * i160.7.7.0/24 150.3.47.2 100 0 200 300 i
> *>i 150.3.25.6 100 0 200 300 i
> * i160.11.1.0/24 150.3.47.2 100 0 200 300 i
> *>i 150.3.25.6 100 0 200 300 i
> * i160.12.1.0/24 150.3.47.2 100 0 200 300 i
> *>i 150.3.25.6 100 0 200 300 i
> * i160.13.1.0/24 150.3.47.2 100 0 200 300 i
> *>i 150.3.25.6 100 0 200 300 i
> *>i195.5.5.0 150.3.53.5 0 100 0 i
> * i195.6.6.0 150.3.47.2 100 0 200 i
> *>i 150.3.25.6 0 100 0 200 i
> * i195.10.2.0 150.3.47.2 100 0 200 i
> *>i 150.3.25.6 0 100 0 200 i
> Network Next Hop Metric LocPrf Weight Path
> *>i196.6.6.0 150.3.53.5 0 100 0 i
> *>i197.7.7.0 150.3.53.5 0 100 0 i
> *>i198.8.8.0 150.3.53.5 0 100 0 i
> *>i200.200.3.0 150.3.26.5 0 100 0 i
> *>i200.200.4.0 150.3.26.5 0 100 0 i
> Cisco250
This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:23:00 GMT-3