Ports can form an EtherChannel when they are in different channel modes as long as the modes are compatible. For example:
a.. A port in desirable mode can form an EtherChannel successfully with another port that is in desirable or auto mode. b.. A port in auto mode can form an EtherChannel with another port in desirable mode. c.. A port in auto mode cannot form an EtherChannel with another port that is also in auto mode, since neither port will initiate negotiation. d.. A port in on mode can form a channel only with a port in on mode, because ports in on mode do not exchange PAgP packets. e.. A port in off mode will not form a channel with any port. Copied from http://www.cisco.com/warp/public/793/lan_switching/6.html The first one suggests your desirable - desirable would be good. Gaz ""Carroll Kong"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > You cannot do both as desirable. One must be desirable and the > other auto. Or you can try forcing the modes to "on" and "on". That might > fix it! > > At 12:57 PM 10/21/01 -0400, Brad Moss wrote: > >I am trying to connect two cat5500s and am unable to get port channel to > >come online. I have configured both sides below is the config of the ports. > >Any help would be greatly appreciated. These are production switches the > >only thing I have to done is reboot them. For some reason they are not > >recognizing that they are connect to the same switch on the other end of > >either link. I am unaware on any "special" things that must happen for port > >channeling both blades support it. > > > > > >Set po channel 8/3-4 mode desirable > >Set trunk 8/3 isl on > >Set trunk 8/4 isl on > > > >Set po channel 1/1-2 desirable > >Set trunk 1/1 isl on > >Set trunk 1/2 isl on > > > >Port Name Status Vlan Level Duplex Speed Type > >----- ------------------ ---------- ---------- ------ ------ ----- -------- - > >--- > > 8/3 connected trunk normal full 100 > 100BaseFX > >MM > > > >Port Status Channel Admin Ch > > Mode Group Id > >----- ---------- -------------------- ----- ----- > > 8/3 connected desirable non-silent 157 0 > > > >Port Name Status Vlan Level Duplex Speed Type > >----- ------------------ ---------- ---------- ------ ------ ----- -------- - > >--- > > 8/4 connected trunk normal full 100 > 100BaseFX > >MM > >Port Status Channel Admin Ch > > Mode Group Id > >----- ---------- -------------------- ----- ----- > > 8/4 connected desirable non-silent 157 0 > > > >SJMDFSW01> (enable) sho po channel > >No ports channeling > > > >Port Name Status Vlan Level Duplex Speed Type > >----- ------------------ ---------- ---------- ------ ------ ----- -------- - > >--- > > 1/1 Uplink SJMDFSW01 connected trunk normal full 100 > 100BaseFX > >MM > > > >Port Status Channel Channel Neighbor Neighbor > > mode status device > port > >----- ---------- --------- ----------- ------------------------- ---------- > > 1/1 connected desirable not channel > > > >Port Name Status Vlan Level Duplex Speed Type > >----- ------------------ ---------- ---------- ------ ------ ----- -------- - > >--- > > 1/2 Uplink SJMDFSW01 connected trunk normal full 100 > 100BaseFX > >MM > > > >Port Status Channel Channel Neighbor Neighbor > > mode status device > >port > >----- ---------- --------- ----------- ------------------------- ---------- > > 1/2 connected desirable not channel > > > >SJDCSW02> (enable) sho po channel > >No ports channelling > > > > > >Brad Moss, CCNA > >Network Administrator > >CHRISTUS St. Joseph's Medical Center - South > >www.christushealth.org > >(903) 737-3160 > >[EMAIL PROTECTED] > -Carroll Kong Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=23700&t=23692 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
