I have an MPLS network with 5 remote locations with 1544 routers, our central office, and our data center. All of the traffic from the remote locations routes out the central office unless it goes down, in which case everything routes out the data center connection.
If I want to ping anything on the public internet from the router cli, I can. If I want to ping/traceroute anything on the MPLS network that is not local, I have to give the command with "source", i.e.
ping 10.0.1.11 source 10.5.0.1 or I get nothing. Netflow is working fine because I could define the source as being eth 0/1.
The default route is going out the ppp MPLS interface, and no one inside the 10.5.0.0/23 network has any issues getting everywhere they need to, including servers at the data center that I cannot reach from the router itself without the "source 10.5.0.1" being added.
And there doesn't appear to be any way to define "source" for the syslog stuff. So the adtrans at the remote sites cannot get their syslog data to the syslog server.
These routers were primarily configured by the telco before we took ownership, so I don't know why they did certain things the way they did. e.g. should proxy-arp actually be enabled for this to work? Or could that break something else in this config? Do you see something else that would fix this problem?
#sh ip route Codes: C - connected, S - static, R - RIP, O - OSPF, B - BGP E1 - OSPF external type 1, E2 - OSPF external type 2 IA - OSPF inter area Gateway of last resort is 22.214.171.124 ppp 1 S 0.0.0.0/0 [1/1/0] via 126.96.36.199, ppp 1 C 10.5.0.0/23 is directly connected, eth 0/1 S 188.8.131.52/17 [1/1/0] via 184.108.40.206, ppp 1 S 220.127.116.11/19 [1/1/0] via 18.104.22.168, ppp 1 C 22.214.171.124/30 is directly connected, ppp 1 C 126.96.36.199/32 is directly connected, ppp 1
Here is what should be the relevant parts of the config from one of the five remote routers (they are all functionally identical):
ip firewall no ip firewall alg msn no ip firewall alg mszone no ip firewall alg h323 ! ip flow export destination 10.0.1.11 7003 source eth 0/1 ip flow export destination 10.0.1.2 9996 source eth 0/1 ip flow cache timeout active 5 ip flow top-talkers ! no ethernet cfm ! interface eth 0/1 description desc LAN Block 10.5.0.0/23 ip address 10.5.0.1 255.255.254.0 no ip proxy-arp ip access-policy LAN ip flow ingress ip flow egress no shutdown no lldp send-and-receive ! interface ppp 1 description DS1NT ip address y.y.133.130 255.255.255.252 no rtp quality-monitoring ppp multilink interleave ppp multilink fragmentation ppp multilink no shutdown cross-connect 1 t1 1/1 1 ppp 1 cross-connect 2 t1 1/2 1 ppp 1 ! ip access-list extended DATA-ACL permit ip 10.5.0.0 0.0.1.255 10.0.0.0 0.0.1.255 permit ip 10.5.0.0 0.0.1.255 10.1.0.0 0.0.0.255 permit ip 10.5.0.0 0.0.1.255 188.8.131.52 0.0.255.255 permit ip 10.5.0.0 0.0.1.255 184.108.40.206 0.0.255.255 deny ip 10.5.0.0 0.0.1.255 10.0.0.0 0.255.255.255 deny ip 10.5.0.0 0.0.1.255 172.16.0.0 0.15.255.255 deny ip 10.5.0.0 0.0.1.255 192.168.0.0 0.0.255.255 permit ip 10.5.0.0 0.0.1.255 any ! ip policy-class LAN allow list DATA-ACL ! ip route 0.0.0.0 0.0.0.0 220.127.116.11 ip route 18.104.22.168 255.255.224.0 10.1.0.1 ip route x.x.0.0 255.255.128.0 y.y.133.129 ip route x.x.128.0 255.255.224.0 y.y.133.129