Solved: Enabling Jumbo frame on Cat OS ports

vbankar · ‎04-27-2010

Could anyone explain why this is happening?

ABCD-SJ-6500-1> (enable) set port jumbo 6/27 enable

Do you want to modify the following ports: 6/25-32 are you sure(y/n) [n]?n

ABCD-SJ-6500-1> (enable)

P.S. - All ports between 6/25 - 32 are on different vlans and etherchannel, so not sure why its asking 6/25 - 32?

Thanks!

Jon Marshall · ‎04-27-2010

vbankar wrote:
Its on module 6, details below:
Mod Slot Ports Module-Type               Model               Sub Status
--- ---- ----- ------------------------- ------------------- --- --------
1   1    2     1000BaseX Supervisor      WS-X6K-SUP1A-2GE    yes ok
6   6    48    10/100/1000BaseT Ethernet WS-X6548-GE-TX      no  ok

According to the release notes this is how the 6548 module is broken down -

Number of ports: 48
Number of port groups: 2
Port ranges per port group: 1-24, 25-48

•The aggregate bandwidth of each set of 8 ports (1-8, 9-16, 17-24, 25-32, 33-40, and 41-48) is 1 Gbps.

So it's not the port group but each set of 8 ports has one ASIC and i suspect this is what you are seeing.

Jon

View solution in original post

Jon Marshall · ‎04-27-2010

vbankar wrote:
Could anyone explain why this is happening? 
ABCD-SJ-6500-1> (enable) set port jumbo 6/27 enable
Do you want to modify the following ports: 6/25-32 are you sure(y/n) [n]?n
ABCD-SJ-6500-1> (enable)
 
P.S. - All ports between 6/25 - 32 are on different vlans and etherchannel, so not sure why its asking 6/25 - 32?
 
Thanks!

I suspect this is to do with port groupings on the module. The same happens when you apply a QOS policy to one port ie. the PFC then applies it to all ports in the port group.

What module is it ?

Jon

vbankar · ‎04-27-2010

Its on module 6, details below:

Mod Slot Ports Module-Type Model Sub Status

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

1 1 2 1000BaseX Supervisor WS-X6K-SUP1A-2GE yes ok

6 6 48 10/100/1000BaseT Ethernet WS-X6548-GE-TX no ok

Jon Marshall · ‎04-27-2010

vbankar wrote:
Its on module 6, details below:
Mod Slot Ports Module-Type               Model               Sub Status
--- ---- ----- ------------------------- ------------------- --- --------
1   1    2     1000BaseX Supervisor      WS-X6K-SUP1A-2GE    yes ok
6   6    48    10/100/1000BaseT Ethernet WS-X6548-GE-TX      no  ok

According to the release notes this is how the 6548 module is broken down -

Number of ports: 48
Number of port groups: 2
Port ranges per port group: 1-24, 25-48

•The aggregate bandwidth of each set of 8 ports (1-8, 9-16, 17-24, 25-32, 33-40, and 41-48) is 1 Gbps.

So it's not the port group but each set of 8 ports has one ASIC and i suspect this is what you are seeing.

Jon

vbankar · ‎04-27-2010

That seems right, I tried couple of port on other 8 bundle as well and same thing happens. Thanks so much. One quick ques though - do you think this problem would get solved if we migrate from Cat OS to IOS?

ABCD-SJ-6500-1> (enable)

ABCD-SJ-6500-1> (enable) set port jumbo 6/27 enable

Do you want to modify the following ports: 6/25-32 are you sure(y/n) [n]?n

ABCD-SJ-6500-1> (enable)

ABCD-SJ-6500-1> (enable) set port jumbo 6/34 enable

Do you want to modify the following ports: 6/33-40 are you sure(y/n) [n]?n

ABCD-SJ-6500-1> (enable)

ABCD-SJ-6500-1> (enable) set port jumbo 6/42 enable

Do you want to modify the following ports: 6/41-48 are you sure(y/n) [n]?n

ABCD-SJ-6500-1> (enable)

Jon Marshall · ‎04-28-2010

vbankar wrote:
That seems right, I tried couple of port on other 8 bundle as well and same thing happens. Thanks so much. One quick ques though - do you think this problem would get solved if we migrate from Cat OS to IOS?
ABCD-SJ-6500-1> (enable)
ABCD-SJ-6500-1> (enable) set port jumbo 6/27 enable
Do you want to modify the following ports: 6/25-32 are you sure(y/n) [n]?n
ABCD-SJ-6500-1> (enable)
ABCD-SJ-6500-1> (enable) set port jumbo 6/34 enable
Do you want to modify the following ports: 6/33-40 are you sure(y/n) [n]?n
ABCD-SJ-6500-1> (enable)
ABCD-SJ-6500-1> (enable) set port jumbo 6/42 enable
Do you want to modify the following ports: 6/41-48 are you sure(y/n) [n]?n
ABCD-SJ-6500-1> (enable)

No it wouldn't make any difference upgrading to IOS as it is to do with how the PFC implements configuration on the modules.

Jon

vbankar · ‎04-28-2010

As the PFC sits on SUP, so will it help if I upgrade the current SUP 1A to SUP II? Or do you recommend upgrading the ws-x6548-ge-tx line card?

Thanks again!

shailesh.h · ‎04-27-2010

Jon pointed it correctly and also link shared below states that

jumbo frames should be enabled on all or none of the ports in a particular VLAN

http://www.netxg.com/Products/Cisco/C6500Series/C6500_CAT_IOS_Comp.html

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.1E/native/configuration/guide/sw_int.html#wp1041111