Hello all, my name is Mariano from Buenos Aires, Argentina. I work at an ISP and I'm responsible for the integration of customers networks to the MPLS enabled backbone. In this case, the topology is as follows: PE1 - Loopback0 1.1.1.1 PE2 - Loopback0 3.3.3.3 RR - Route Reflector - Loopback0 2.2.2.2 Situation: OSPF is running in this PE-CE topology. In PE's side, OSPF is enabled under the desired customer VRF. Customer network 10.84.56.0/24 is reachable from the MPLS backbone in its VRF: PE1#sh ip ro vrf vpn_Int 10.84.56.0 Routing entry for 10.84.56.0/24   Known via "ospf 16", distance 110, metric 74, type intra area   Redistributing via bgp 11664   Advertised by bgp 11664 match internal external 1 & 2   Last update from 10.1.2.2 on Serial0/0, 00:10:49 ago   Routing Descriptor Blocks:   * 10.1.2.2, from 10.84.56.2, 00:10:49 ago, via Serial0/0       Route metric is 74, traffic share count is 1 PE2#sh ip ro vrf vpn_Int 10.84.56.0 Routing entry for 10.84.56.0/24   Known via "ospf 16", distance 110, metric 74, type intra area   Redistributing via bgp 11664   Advertised by bgp 11664 match internal external 1 & 2   Last update from 10.1.2.6 on Serial0/0, 00:13:04 ago   Routing Descriptor Blocks:   * 10.1.2.6, from 10.84.56.2, 00:13:04 ago, via Serial0/0       Route metric is 74, traffic share count is 1 So far, so good. My question is regarding CE's routing table: PUB_A#sh ip ro | b resort Gateway of last resort is not set      9.0.0.0/26 is subnetted, 1 subnets O E2    9.9.9.0 [110/1] via 10.1.2.1, 00:14:01, Serial0/0      10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks O       10.1.2.8/30 [110/65] via 10.1.2.1, 00:14:11, Serial0/0 O E2    10.49.51.0/25 [110/1] via 10.1.2.1, 00:14:01, Serial0/0 O E2    10.48.50.0/25 [110/1] via 10.1.2.1, 00:14:01, Serial0/0 C       10.1.2.0/30 is directly connected, Serial0/0 O       10.1.2.4/30 [110/74] via 10.84.56.2, 00:14:11, FastEthernet0/0 O       10.1.2.16/30 [110/75] via 10.84.56.2, 00:14:11, FastEthernet0/0 O E2    10.90.2.0/24 [110/1] via 10.84.56.2, 00:14:01, FastEthernet0/0 O E2    10.92.2.0/24 [110/1] via 10.1.2.1, 00:14:01, Serial0/0 C       10.84.56.0/24 is directly connected, FastEthernet0/0 ============= PUB_B#sh ip ro | b resort Gateway of last resort is not set      9.0.0.0/26 is subnetted, 1 subnets O E2    9.9.9.0 [110/1] via 10.1.2.5, 00:15:26, Serial0/0      10.0.0.0/8 is variably subnetted, 9 subnets, 3 masks O       10.1.2.8/30 [110/75] via 10.84.56.1, 00:15:36, FastEthernet0/0 O E2    10.49.51.0/25 [110/1] via 10.84.56.1, 00:15:26, FastEthernet0/0 O E2    10.48.50.0/25 [110/1] via 10.84.56.1, 00:15:26, FastEthernet0/0 O       10.1.2.0/30 [110/74] via 10.84.56.1, 00:15:36, FastEthernet0/0 C       10.1.2.4/30 is directly connected, Serial0/0 O       10.1.2.16/30 [110/65] via 10.1.2.5, 00:15:36, Serial0/0 O E2    10.90.2.0/24 [110/1] via 10.1.2.5, 00:15:26, Serial0/0 O E2    10.92.2.0/24 [110/1] via 10.84.56.1, 00:15:26, FastEthernet0/0 C       10.84.56.0/24 is directly connected, FastEthernet0/0 For example, network 10.90.2.0/24 is part of the same customer VRF's (vpn_Int) and it's configured in Loopback5 in PE1. To reach this network from customer PUB_A router, it's next-hop is 10.84.56.2 (PUB_B), and then, it's routed to the MPLS backbone. PUB_A#traceroute 10.90.2.1 Type escape sequence to abort. Tracing the route to 10.90.2.1   1 10.84.56.2 36 msec 24 msec 36 msec   2 10.1.2.5 20 msec 28 msec 8 msec   3 10.90.2.1 [MPLS: Label 27 Exp 0] 36 msec *  36 msec This behavior happens with other routes, but viceversa: PUB_B is pointing to PUB_A for other destinations (for example, 10.48.50.0/25). So I have some routes exiting from customer side via PUB_B and other networks via PUB_A. How can I configure customer side to unify all reachable networks through MPLS backbone to the same exit router? (for instance, PUB_A) What other considerations do I have to take into account? This forum rocks! Thanks a lot! Mariano. ... View more

Hi, We have several issues when trying autonegotiaton in ethernet ports that support 1 GB ethernet speed. It doesn't autonegotiate this speed. Does anybody know what is the correct steps or sequence of commands that should be issued? Thanks. Mariano. ... View more

Hi, I have a doubt. My customer is sourced in net A, and he needs to reach net C, passing through net B, because the politics in the company where I work, doesn't allow direct access from net A to net C. Ok, but the user wants to use TFTP from his laptop to transfer files to a machine placed in net C. How can I open a firewall rule so he can reach the destiny in net C via TFTP? Can I use a sock server for a UDP port?? The scheme: NET A (source) <-> NET B (middle network) <-> NET C (destination) ... View more