Hi, I would like to ask your opinion on an issue I see in a configuration where a 7204 acts as a CE and it is running Ethernet LMI on an FastE interface:
interface FastEthernet2/0 no ip address logging event subif-link-status duplex full no keepalive ethernet lmi interface ethernet lmi t391 10 ethernet lmi n393 4 ! interface FastEthernet2/0.10 encapsulation dot1Q 10 ip address 10.0.11.12 255.255.255.0 As soon as the PE is sending an Ethernet LMI Status Full Status message with one EVC MAP entry indicating that EVC10 (mapped to VLAN 10 )is new and active in the MEN, the line protocol on interface Fast 2/0 changes status to down, the subinterface Fast 2/0.10 stays up (because LMI indicated the EVC associated to VLAN 10 is active). c7204#show int fast 2/0 FastEthernet2/0 is up, line protocol is down Hardware is AmdFE, address is 0005.dd6e.9038 (bia 0005.dd6e.9038) MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set Keepalive not set Full-duplex, 100Mb/s, 100BaseTX/FX ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:12, output 00:00:04, output hang never Last clearing of "show interface" counters never Input queue: 0/75/40/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 842 packets input, 62128 bytes Received 0 broadcasts, 0 runts, 0 giants, 1 throttles 1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog 0 input packets with dribble condition detected 17244 packets output, 1683765 bytes, 0 underruns 0 output errors, 0 collisions, 35 interface resets 57 unknown protocol drops 57 unknown protocol drops 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out My take is the line protocol status on interface fast 2/0 changes to down because there was no indication from PE of an active EVC associated with VLAN 1 (native VLAN the system associates by default with interface fast 2/0). At this point the interface Fast 2/0 keeps sending Ethernet LMI PDUs (as expected by LMI protocol) but it does not accept any Ethernet LMI PDUs from PE ( Ethernet LMI PDUs are untagged ). If the PE includes the VLAN 1 in the CE-VLAN map it sends (or if I set the VLAN 10 as native on CE ) the Ethernet LMI PDUs exchange will be successful. I wonder if I miss something in CE configuration as it looks unusual to me the Ethernet LMI has to "enable" the data path it will use to send owns PDUs. Please let me know your opinion. Thanks, Florin _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
