06-16-2014 11:50 PM
In our enterprise MPLS network we are using 192.168.20.0/24 subnet, in this subnet we have not assigned the IP 192.168.20.200/30 & 204/30, But still these subnets are reachable . Are these NNI IP ...Please explain.
06-17-2014 01:33 AM
R you on customer site ? If yes check with your service provider and tell them to remove these subnet advertisement to your network.You are only getting routes not actual host allocating to them
Regards,
Ashish
06-17-2014 01:38 AM
I have checked with ISP, there response is like below:
Those are the NNI to GBNET IPs for Dominican Republic. They are Network IPs. You should be able to ping them-that means they are working.
WANRT01#show ip route | include 192.168.20.20
B 192.168.20.200/30 [20/0] via 192.168.20.226, 02:18:29
B 192.168.20.204/30 [20/0] via 192.168.20.226, 02:18:29
Here its shows from any of our MPLS site we are able to trace the IP and it seems like, 192.168.20.204/30 is one more site but in actual its not.
INMUMWANRT01#ping 192.168.20.205
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.205, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 224/232/260 ms
INMUMWANRT01#trace
INMUMWANRT01#traceroute 192.168.20.205
Type escape sequence to abort.
Tracing the route to 192.168.20.205
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.20.226 24 msec 24 msec 24 msec
2 192.168.20.206 [AS 8035] 232 msec 232 msec 252 msec
3 192.168.20.205 [AS 8035] 224 msec 224 msec *
06-17-2014 02:10 AM
I feel this are point to point devices interface IP address like PE( provider edge ) to CE (Customer edge) ,not sure about ur network topology but check ur remote device IP address pointing toward SP. What do u mean by NNI , is it network node interface ? in case if they have any ME switches on the remote end.
Are these subnets causing any problm in your network, I meant duplicate IP address or redirecting traffic in wrong direction? You can use inbound prefix-list in BGP to filter those.
Regards
Ashish
06-17-2014 02:41 AM
As of now its not causing any issue.
as you are saying "I feel this are point to point devices interface IP address like PE( provider edge ) to CE (Customer edge) ". If its is...Then we must be able to telnet our CE device...but we are not.
NNI means i guess
a network-to-network interface (NNI) is an interface which specifies signaling and management functions between two networks.
07-02-2014 07:31 AM
ISP doesn;t have last mile services, so it has used another intermediate service provider and its's using that /30 subnet.
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