09-10-2008 06:50 AM - edited 03-03-2019 11:29 PM
We are implimenting a new subnet
172.20.255.8/255.255.255.248
172.20.255.9 HSRP VIP gw
172.20.255.10 router A
172.20.255.11 router b
172.20.255.12
172.20.255.13
172.20.255.14
172.20.255.15
I have configured the .10 address as a secondary IP address on one of the ethernet interfaces. But our ISP is saying they do not see us sending the route, but I believe we have it configured correctly
router ospf 711
log-adjacency-changes
redistribute connected subnets
redistribute bgp 65002 subnets
network 192.168.2.0 0.0.0.255 area 1
network 192.168.100.0 0.0.0.255 area 1
network 192.168.118.0 0.0.0.255 area 1
network 192.168.255.0 0.0.0.255 area 1
router bgp 65vv2
no synchronization
bgp log-neighbor-changes
network 192.168.255.128 mask 255.255.255.248
redistribute ospf 711 match internal external 1 external 2 route-map none-from-
bgp
neighbor 192.168.255.10 remote-as 3561
neighbor 192.168.255.10 prefix-list fr-3561 in
neighbor 192.168.255.10 prefix-list to-3561 out
no auto-summary
ip prefix-list fr-3561 seq 5 deny 192.168.1.0/24
ip prefix-list fr-3561 seq 6 deny 192.168.21.0/24
ip prefix-list fr-3561 seq 10 permit 192.168.0.0/16 le 32
ip prefix-list fr-3561 seq 15 permit x2.1x.37.xxx/26 le 32
ip prefix-list fr-3561 seq 20 permit 2x.xx.135.xxx/26 le 32
ip prefix-list fr-3561 seq 25 permit 6x.14.xx.xxx/28 le 32
ip prefix-list fr-3561 seq 30 permit 172.30.0.0/16 le 32
ip prefix-list fr-3561 seq 35 permit 172.20.0.0/16 le 32
!
ip prefix-list to-3561 seq 5 deny 192.168.1.0/24
ip prefix-list to-3561 seq 10 permit 192.168.0.0/16 le 32
access-list 2 permit 192.168.1.0 0.0.0.255
access-list 150 deny ip host 192.168.2.15 any
access-list 150 permit ip any any
route-map none-from-bgp deny 10
match tag 3561
!
route-map none-from-bgp permit 20
This is what our ISP has in their router
access-list 45 permit 172.20.0.0 0.0.255.255
ISProuter#show ip bgp neighbors 192.168.255.9 received-routes BGP table version is 81678, local router ID is 192.168.255.10 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 192.168.2.0 192.168.255.9 0 0 65002 ?
* 192.168.255.8/30 192.168.255.9 0 0 65002 ?
*> 192.168.255.44/30
192.168.255.9 2 0 65002 ?
*> 192.168.255.128/29
192.168.255.9 0 0 65002 i
Total number of prefixes 4
09-10-2008 07:06 AM
hi
can you see the secondary address in your routing table ??
can you paste the output of your routing table ??
09-10-2008 07:29 AM
currently i only have the .9-.11 configured on the routers..but im not sure they would be able to if they arent seeing the network
09-10-2008 07:38 AM
sure
myrouter#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level
ia - IS-IS inter area, * - candidate default, U - per-user static r
o - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.2.246 to network 0.0.0.0
B 192.168.166.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.88.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.13.0/24 [20/4] via 192.168.255.10, 3w4d
B 192.168.167.0/24 [20/5003] via 192.168.255.10, 5d13h
B 192.168.133.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.14.0/24 [20/5] via 192.168.255.10, 3w4d
B 192.168.151.0/24 [20/5003] via 192.168.255.10, 01:44:52
B 192.168.164.0/24 [20/5003] via 192.168.255.10, 1d05h
192.168.120.0/24 is variably subnetted, 2 subnets, 2 masks
B 192.168.120.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.120.248/29 [20/4] via 192.168.255.10, 3w4d
B 192.168.15.0/24 [20/4] via 192.168.255.10, 3w4d
B 192.168.150.0/24 [20/5003] via 192.168.255.10, 3d22h
B 192.168.165.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.93.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.162.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.9.0/24 [20/4] via 192.168.255.10, 1w4d
B 192.168.92.0/24 [20/4] via 192.168.255.10, 3w4d
B 192.168.163.0/24 [20/5003] via 192.168.255.10, 1w0d
B 192.168.10.0/24 [20/4] via 192.168.255.10, 1w4d
B 192.168.160.0/24 [20/5003] via 192.168.255.10, 07:25:41
172.20.0.0/16 is variably subnetted, 4 subnets, 2 masks--------
B 172.20.255.0/29 [20/5003] via 192.168.255.10, 1w4d----------
C 172.20.255.8/29 is directly connected, GigabitEthernet0/1-----------------
B 172.20.255.32/29 [20/4] via 192.168.255.10, 4d06h--------
B 172.20.0.0/16 [20/4] via 192.168.255.10, 1w4d------
B 172.30.0.0/16 [20/4] via 192.168.255.10, 1w4d--------
192.168.124.0/32 is subnetted, 6 subnets
B 192.168.124.100 [20/5003] via 192.168.255.10, 03:55:58
B 192.168.124.101 [20/5003] via 192.168.255.10, 02:33:24
B 192.168.124.102 [20/5003] via 192.168.255.10, 02:42:37
B 192.168.124.103 [20/5003] via 192.168.255.10, 02:21:43
B 192.168.124.96 [20/5003] via 192.168.255.10, 01:37:48
B 192.168.124.97 [20/5003] via 192.168.255.10, 01:34:13
B 192.168.161.0/24 [20/5003] via 192.168.255.10, 4d11h
B 192.168.251.0/24 [20/4] via 192.168.255.10, 1w4d
192.168.157.0/29 is subnetted, 2 subnets
09-10-2008 09:24 AM
Hi,
What does your show ip bgp neighbor [isp-bgp peer IP] advertised-routes say ?
09-10-2008 10:08 AM
myrouter#sh ip bgp neighbors 192.168.255.10 advertised-routes
BGP table version is 48381, local router ID is 192.168.255.130
Status codes: s suppressed, d damped, h history, * valid, > best, i - interna
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 192.168.2.0 0.0.0.0 0 32768 ?
*> 192.168.255.8/30 0.0.0.0 0 32768 ?
*> 192.168.255.44/30
192.168.2.247 2 32768 ?
*> 192.168.255.128/29
0.0.0.0 0 32768 i
Total number of prefixes 4
09-10-2008 08:11 AM
You can't redistribute into one routing protocol then redistribute again into another routing protocol. You have a few options.
router ospf 711
network 172.20.255.8 0.0.0.7 area 1
or
router bgp 65xxx
network 172.20.255.8 mask 255.255.255.248
or
router bgp 65xxx
redistribute connected
HTH
09-10-2008 10:25 AM
cfolkerts
Is it that im not advertising at all or am redistributing twice?
09-10-2008 10:29 AM
You are not advertising it at all. You can verify this by issuing the command "show ip bgp neigh x.x.x.x advertised-routes" which appears that you have done already. Just add the network command to BGP and all will be OK.
router bgp 65xxx
network 172.20.255.8 mask 255.255.255.248
HTH
09-10-2008 11:43 AM
thx..will do
I went into another sites router..basically the same config..and looked it over..we are also adding a different subnet..but i dont see where it is advertised
Yet..BGP is advertising it from the sh ip
bgp nei........advertised routes
router ospf 711
router-id 192.168.92.251
log-adjacency-changes
redistribute connected subnets
redistribute static subnets
redistribute bgp 65007 subnets
network 192.168.92.0 0.0.0.255 area 1
!
router bgp 65007
no synchronization
bgp log-neighbor-changes
redistribute connected
redistribute ospf 711 match internal external 1 external 2 route-map none-from
bgp
neighbor 192.168.255.30 remote-as 3561
neighbor 192.168.255.30 prefix-list fr-3561 in
neighbor 192.168.255.30 prefix-list to-3561 out
no auto-summary
ip prefix-list fr-3561 seq 10 permit 192.168.0.0/16 le 32
ip prefix-list fr-3561 seq 15 permit 64.14.47.xx/26 le 32
ip prefix-list fr-3561 seq 20 permit 216.74.135.xxxx/26 le 32
ip prefix-list fr-3561 seq 25 permit 64.14.46.xxx/28 le 32
ip prefix-list fr-3561 seq 30 permit 172.20.0.0/16 le 32
!
ip prefix-list to-3561 seq 10 permit 192.168.0.0/16 le 32
ip prefix-list to-3561 seq 15 permit 172.20.255.32/29 le 32
access-list 23 permit 10.10.10.0 0.0.0.7
access-list 25 permit 192.168.0.0 0.0.255.255
myrouter#sh ip bgp neighbors 192.168.255.30 advertised-routes
BGP table version is 66093, local router ID is 192.168.255.29
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 172.20.255.32/29 0.0.0.0 0 32768 ?
*> 192.168.92.0 0.0.0.0 0 32768 ?
*> 192.168.255.28/30
0.0.0.0 0 32768 ?
*> 192.168.255.32/30
192.168.92.252 20 32768 ?
Total number of prefixes 4
09-10-2008 12:06 PM
172.20.255.32/29 is redistributed into BGP. ? sign indicates as incomplete meaning that it's being redistributed. Check directly connected networks. You should see this network in your routing table as directly connected.
09-10-2008 12:28 PM
hi rsmage1, i checked the second site and this is what i have for that network
172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks
B 172.20.255.0/29 [20/5004] via 192.168.255.30, 4d10h
C 172.20.255.32/29 is directly connected, GigabitEthernet0/1
B 172.20.0.0/16 [20/4] via 192.168.255.30, 4d10h
but in the first site example i also show that network as connected..wouldnt it also be advertised?
B 192.168.160.0/24 [20/5003] via 192.168.255.10, 12:16:50
172.20.0.0/16 is variably subnetted, 4 subnets, 2 masks
B 172.20.255.0/29 [20/5003] via 192.168.255.10, 1w4d
C 172.20.255.8/29 is directly connected, GigabitEthernet0/1
B 172.20.255.32/29 [20/4] via 192.168.255.10, 4d10h
B 172.20.0.0/16 [20/4] via 192.168.255.10, 1w4d
B 172.30.0.0/16 [20/4] via 192.168.255.10, 1w4d
router ospf 711
log-adjacency-changes
redistribute connected subnets
redistribute bgp 6x02 subnets
network 192.168.2.0 0.0.0.255 area 1
network 192.168.100.0 0.0.0.255 area 1
network 192.168.118.0 0.0.0.255 area 1
network 192.168.255.0 0.0.0.255 area 1
09-10-2008 12:34 PM
Check the difference between the bgp configuration between your first and second sites.
09-10-2008 12:35 PM
So you are redistributing 172.20.255.8/29 connected network into BGP with,
router bgp 65007
redistribute connected.
I suppose you could do the same thing on your first router such that it will advertise your /29 network to ISP via BGP.
09-10-2008 12:24 PM
Under the router bgp 65007, the command "redistribute connected" is implemented. This will advertise the network 172.20.255.32/29 since it is connected.
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