<CE>--------------------------------Metroethernet(carrier)---------------------<switch>----ethernet(cable)-----<PE>
for a link as simple as above, if : + the CE , the Agg. switch and the PE interfaces are in the same vlan + the CE and the PE IP interfaces are in the same subnet the i must (at least) have an entry in arp table, and ping successful, which is not the case what was getting me crazy , is that all interfaces are up-up all the time, but i just recieved a feedback today that MetroEthernet carriers have NTU's acting as Ethernet HUB, so as long as they are functional , you will have the interfaces up-up even if the circuit is broken inside the carrier !!! tomorrow i will order dual dispatch to both ends, will test circuit termination at both ends "traceroute mac" feature is not in CE or PE IOS On Wed, Feb 4, 2009 at 1:25 PM, Ahmed Maged (amaged) <[email protected]>wrote: > Troubleshoot layer by layer. > > If the lower layers doesn't work, don't expect anything to behave > properly. > > Follow the L2 frame with (ltrace) if available on your IOS. > > How about debugging? > > Can you install a sniffer? > > What do you see on the interfaces counters? > > Did you try anything else other than ping, maybe ICMP is blocked. > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Ahmed Mohamed > Sent: Tuesday, February 03, 2009 2:28 AM > To: [email protected] > Subject: [c-nsp] reacheability issue in MEL link > > Hello, > > this is a real life problem still occuring, and have no idea what may be > causing it .. > > we are providing an internet direct service to our customer vial MEL > (Metro > Ethernet Link) > > CE (CS-7206 VXR) fe2/0.36 ------------------Etherlink(local > carrier)---------------- WS-3759G-24TS--PE(CS-7000) > > the solution is providied using a carrier to link the customer CE to an > aggregated switch, using Metro Ethernet > configuring vlan 36 and using dot1q encapsulation > then from the aggregating switch to the PE router using also > encapsulation > dot1q for vlan36 > > all interfaces are up-up , and still ping fails !! > > i tried everything, resetting ports, switches, reconfigure interfaces > ..etc. > still no joy > > any idea what could be causing the problem ? > > ======================================================================== > CE: > ----- > interface FastEthernet2/0.36 > bandwidth 61440 > encapsulation dot1Q 36 > ip address 57.78.2.6 255.255.255.252 > ======================================================================== > Agg. switch: > ------------------ > interface GigabitEthernet1/0/9 > switchport trunk encapsulation dot1q > switchport trunk native vlan 3109 > switchport trunk allowed vlan 36,3109 > switchport mode trunk > switchport nonegotiate > duplex full > speed 100 > mls qos trust cos > spanning-tree bpdufilter enable > ======================================================================== > PE: > ------ > interface FastEthernet5/1/1.36 > bandwidth 61440 > encapsulation dot1Q 36 > ip address 57.78.2.5 255.255.255.252 > no ip redirects > no ip proxy-arp > no ip route-cache > no cdp enable > ======================================================================== > bmil305#sh int FastEthernet5/1/1.36 > FastEthernet5/1/1.36 is up, line protocol is up <<<<<< > Hardware is cyBus FastEthernet Interface, address is 0003.fe91.b8a9 (bia > 0003.fe91.b8a9) > Internet address is 57.78.2.5/30 > MTU 1500 bytes, BW 61440 Kbit, DLY 100 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation 802.1Q Virtual LAN, Vlan ID 36. > ARP type: ARPA, ARP Timeout 04:00:00 > ======================================================================== > pmil2534#sh int Fa2/0.36 > FastEthernet2/0.36 is up, line protocol is up <<<<<< > Hardware is i82543 (Livengood), address is 0022.be8b.1038 (bia > 0022.be8b.1038) > Description: --- To bmil305 - FE5/1/1.5 > Internet address is 57.78.2.6/30 > MTU 1500 bytes, BW 61440 Kbit, DLY 100 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation 802.1Q Virtual LAN, Vlan ID 36. > ======================================================================== > ping pe to CE fails: > ---------------------------- > bmil305#ping 57.78.2.6 <<<<<<, > Type escape sequence to abort. > Sending 5, 100-byte ICMP Echos to 57.78.2.6, timeout is 2 seconds: > ..... > Success rate is 0 percent (0/5) > ======================================================================== > PE to internet (google) successfully: > ------------------------------------------------------ > bmil305#ping 216.239.59.147 source fast 5/1/1.36 repeat 100 size 500 > Type escape sequence to abort. > Sending 100, 500-byte ICMP Echos to 216.239.59.147, timeout is 2 > seconds: > Packet sent with a source address of 57.78.2.5 > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > Success rate is 100 percent (100/100), round-trip min/avg/max = > 36/40/112 ms > ======================================================================== > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
