Are the EX2500's configured for jumbos? -b
-----Original Message----- From: juniper-nsp-boun...@puck.nether.net [mailto:juniper-nsp-boun...@puck.nether.net] On Behalf Of Stefan Fouant Sent: Saturday, March 06, 2010 6:41 AM To: Eric Van Tol; juniper-nsp-boun...@puck.nether.net; Juniper-Nsp Subject: Re: [j-nsp] Strange IS-IS Problem What happens when you reduce the physical MTUs on the MX and the J-Series to something smaller? Same behavior? Stefan Fouant Sent from my Verizon Wireless BlackBerry -----Original Message----- From: Eric Van Tol <e...@atlantech.net> Date: Sat, 6 Mar 2010 07:53:41 To: Juniper-Nsp<juniper-nsp@puck.nether.net> Subject: [j-nsp] Strange IS-IS Problem Hi all, I've got a strange ISIS problem and I'm hoping another set of eyes can help me identify what is wrong here. I've got an MX960 logically connected to a J2320 through two EX2500 switches: MX960 <==> EX2500 <==> EX2500 <==> J2320 I'm simply trying to get ISIS working between the two routers and it's not coming up. Traceoptions don't show anything out of the ordinary. MX960: xe-1/2/0 { vlan-tagging; mtu 9192; unit 1 { vlan-id 1; family inet { mtu 1500; address x.x.x.99/28; } family iso; } } lo0 { unit 0 { family inet { address 127.0.0.1/32; address x.x.x.74/32; } family iso { address 47.0001.xxxx.xxxx.xxxx.00; } } } ... protocols { isis { interface xe-1/2/0.1; interface lo0.0 { passive; } } } J2320: ge-0/0/0 { vlan-tagging; mtu 9192; unit 1 { vlan-id 1; family inet { mtu 1500; address x.x.x.100/28; } family iso; } } lo0 { unit 0 { family inet { address 127.0.0.1/32; address x.x.x.75/32; } family iso { address 47.0001.xxxx.xxxx.xxxx.00; } } } ... protocols { isis { interface ge-0/0/0.1; interface lo0.0 { passive; } } } I can ping fine between the two: r...@router1# run ping x.x.x.99 source x.x.x.100 PING x.x.x.99 (x.x.x.99): 56 data bytes 64 bytes from x.x.x.99: icmp_seq=0 ttl=64 time=4.890 ms 64 bytes from x.x.x.99: icmp_seq=1 ttl=64 time=2.098 ms 64 bytes from x.x.x.99: icmp_seq=2 ttl=64 time=2.095 ms 64 bytes from x.x.x.99: icmp_seq=3 ttl=64 time=2.130 ms 64 bytes from x.x.x.99: icmp_seq=4 ttl=64 time=4.217 ms ^C --- x.x.x.99 ping statistics --- 5 packets transmitted, 5 packets received, 0% packet loss round-trip min/avg/max/stddev = 2.095/3.086/4.890/1.217 ms If I monitor traffic on either of the interfaces, I see ISIS packets leaving, but nothing coming in. The EX2500s have a very vanilla config and I'm doing no filtering on them. Any ideas? Thanks, evt _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp