multichassis etherchannel to 3560 problem

[Ahmed Abd El-Moaaz]

i have 2 6509 switches configured with VSS (distribution) and i want to connect the edge switches (3560) with multichassin etherchannel (2 uplinks) but when i type #show etherchannel port-channel        command on the 3560 switch all i get is zero values index 0 & 0 ,load 00 & 00 ,no of bits 0 & 0

and it is configured with LACP and all ports match ,    is this a bug or what ????

interestingly when i type #show etherchannel port-channel on the distribution switch (2 * 6509 with vss ) it seem working and load is 55 & AA , index is     0 , 1 and every thing work normaly

please help as i donot know if i can use multichassis etherchannel ?????

[Reza Sharifi]

Hi Ahmed,

Multichassis EtherChannel (MEC) is not supported on 3560 series switches.  It is only supported on 3750 series switches.

HTH

Reza

[Ahmed Abd El-Moaaz]

thx reza for ur response

to be clear iam configuring MEC on the 2 6509 switches VSS and normal etherchannel on the otherside where 3560 switch exist

so iam not configuring MEC on 3560

so what do u mean by MEC is not supported in 3560 ????????

[Reza Sharifi]

Ahmed,

If you have 2 3560 switches and are trying to build an EtherChanned using both 3560s to the VSS pair, it is not going to work, because 3560s are not stack able, however if you had 2 3750s and trying to do the same it will work, since the 3750s are stack able.  So, since the 3750s are stack able MEC or cross stack EtherChannel is possible but not with 3560s.  If you only have one 3560 then yes, you can simply build an EtherChanned from one 3560 to the VSS pair.

HTH

Reza

[Ahmed Abd El-Moaaz]

my design is to connect one switch 3560 with 2 uplinks to the (2 6509 switches which is logically one using vss)  for redundancy each link will be connected to (one chass 6509)

the etherchannel is up and ports are bundeled but the #show etherchannel port-channel        results zeroes for example the index for both ports is 0 which is should be 0 for port and 1 for another port

and the load should be AA for one port and 55 for the other port

but the load is 00 for both ports bundeled in the etherchannel

and really thx for ur help and fast response

Ahmed

[Reza Sharifi]

Are you using 10Gig for your uplinks from the 3560s to the VSS pair?

If yes, are you connecting the uplinks to the Sup-720-VS on the 6500s or line cards?\

Is VSS up and running?

[Ahmed Abd El-Moaaz]

VSS up and running and the uplinks from the 3560 is 1 G to modules 1 G in the VSS pair

the etherchannel is up and i can connect from 3560 to the VSS pairs but i donot understand why the show etherchannel port-channel on 3560 gives zero results

but when i type #show etherchannel portchannel      on the VSS pair i see every thing normal for example indexes for the 2 ports 0, 1 and the load is 55 and AA

so why is that

index  load   port     no of bits                ---------on the 3560 switch

0         00     gi0/1         0

0         00      gi0/2         0

[Scott Cannon]

Hi Ahmed,

What is the state of each etherchannel?

Can you please provide the output of a sho etherchannel summary from each device?

Cheers

Scott

[Ahmed Abd El-Moaaz]

============on the VSS pair==================

MAL01DCSBB1#sh etherchannel 40 port-channel

                Port-channels in the group:

                ----------------------

Port-channel: Po40

------------

Age of the Port-channel   = 0d:16h:29m:32s

Logical slot/port   = 46/5          Number of ports = 2

GC                  = 0x00280001      HotStandBy port = null

Port state          = Port-channel Ag-Inuse

Protocol            =   PAgP

Fast-switchover     = disabled

Load share deferral = disabled  

Ports in the Port-channel:

Index   Load      Port          EC state       No of bits

------+------+------------+------------------+-----------

0      55        Gi2/2/1    Desirable-NonSl   4

1      AA        Gi2/2/2    Desirable-NonSl   4

Time since last port bundled:    0d:15h:33m:19s    Gi2/2/2

Time since last port Un-bundled: 0d:15h:33m:49s    Gi2/2/2

Last applied Hash Distribution Algorithm: Fixed

===================on the 3560===================

Switch#sh etherchannel summary

Flags:  D - down        P - in port-channel

        I - stand-alone s - suspended

        H - Hot-standby (LACP only)

        R - Layer3      S - Layer2

        U - in use      f - failed to allocate aggregator

        u - unsuitable for bundling

        w - waiting to be aggregated

        d - default port

Number of channel-groups in use: 2

Number of aggregators:           2

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

4      Po4(SD)          -       

40     Po40(SU)        PAgP      Gi0/1(P)    Gi0/2(P)   

Switch#show etherchannel 40 port-channel

                Port-channels in the group:

                ---------------------------

Port-channel: Po40

------------

Age of the Port-channel   = 0d:20h:48m:00s

Logical slot/port   = 2/40          Number of ports = 2

GC                  = 0x00280001      HotStandBy port = null

Port state          = Port-channel Ag-Inuse

Protocol            =   PAgP

Ports in the Port-channel:

Index   Load   Port     EC state        No of bits

------+------+------+------------------+-----------

  0     00     Gi0/1    Desirable-NonSl    0

  0     00     Gi0/2    Desirable-NonSl    0

Time since last port bundled:    0d:15h:37m:57s    Gi0/2

Time since last port Un-bundled: 0d:15h:38m:28s    Gi0/2

sh what does the output on the 3560 with all zeroes mean ???? plz some one hepl is the etherchannel ok or what?????/

[Ahmed Abd El-Moaaz]

will any one answer my question plz ????????

[sajid_m123]

I think, for 3560 or 3700 switches it is normal o/p. You will notice some #s on models like 6500 etc.

[jeffjadryev]

Hi Ahmed,

If you look at the output of sh interface po40 on each switch are the packets input and output counters changing? This may help you confirm whether or not the link is working and if the output of sh etherchannel summ on the 3560 is in error.

Hope this helps,

Jeff