It's strange that one end shows the interface as up, but the other does not.
Is it possible that you're using SFPs that only do 1000base-T? What if you take the individual ports out of the ae / etherchannel and just go point-to-point, does the link show as up then? Maybe try cabling up to the management port (a known 100base-T port) or a laptop and see if the link shows up? At least that way, you could rule out the Cisco being wrong about the link status. --j On Wed, Mar 13, 2013 at 3:40 PM, snort bsd <[email protected]> wrote: > hi all: > > i have a cisco 3750 fastethernet switch connecting to a juniper 4200, with > portchannel on cisco side and aggregated interface juniper side. the cisco > side shows as "connected" but juniper side remain down. could anyone give me > some ideas? no lacp activated on both side. > > for cisco: > > cisco-3750#sh int fast1/0/9 > FastEthernet1/0/9 is up, line protocol is up (connected) > Hardware is Fast Ethernet, address is 0018.b99f.5d8b (bia 0018.b99f.5d8b) > MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation ARPA, loopback not set > > cisco-3750#sh interfaces por10 > Port-channel10 is up, line protocol is up (connected) > Hardware is EtherChannel, address is 0018.b99f.5d8c (bia 0018.b99f.5d8c) > MTU 1500 bytes, BW 200000 Kbit, DLY 100 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation ARPA, loopback not set > Full-duplex, 100Mb/s, link type is auto, media type is unknown > input flow-control is off, output flow-control is unsupported > Members in this channel: Fa1/0/9 Fa1/0/10 > > > interface Port-channel10 > switchport access vlan 100 > switchport mode access > > interface FastEthernet1/0/9 > switchport access vlan 100 > switchport mode access > switchport nonegotiate > channel-group 10 mode on > > > for juniper: > > user@4200-1# run show interfaces terse ge-0/0/9 > Interface Admin Link Proto Local Remote > ge-0/0/9 up down > ge-0/0/9.0 up down aenet --> ae1.0 > > user@4200-1# run show interfaces ae1 terse > Interface Admin Link Proto Local Remote > ae1 up down > ae1.0 up down eth-switch > > > user@4200-1# show interfaces ge-0/0/9 > ether-options { > no-auto-negotiation; > link-mode full-duplex; > speed { > 100m; > } > 802.3ad ae1; > } > > user@4200-1# show interfaces ae1 > > ae1 { > aggregated-ether-options { > minimum-links 1; > link-speed 100m; > } > unit 0 { > family ethernet-switching { > port-mode access; > } > } > } > > > _dave > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
