Cat6500 - Speed Auto 100 Command

[Robert Ho]

Hi all, it appears that the WS-X6748-GE-TX module does not support the "speed auto 100" feature.

We need to limit the customer Inbound/Outbound to a burstable 100 without having to hard-code each client.

The access switches, eg Cat2960G, supports it and am a bit surprised the Cat6500 does not.

Any easy way to limit it? I believe we can use QoS/Policer to do it on the inbound but cannot on the outbound.

Thanks for the help, robert.

[IAN WHITMORE]

speed {10 | 100 | 1000 | auto [10 | 100 |1000] | nonegotiate}

Enter the appropriate speed parameter for the interface: •Enter 10, 100, or 1000 to set a specific speed for the interface. The 1000keyword is available only for 10/100/1000 Mbps ports. •Enter auto to enable the interface to autonegotiate speed with the connected device. If you use the 10, 100, or the 1000 keywords with theauto keyword, the port autonegotiates only at the specified speeds.

So in your configuration on the 2960 you are basically telling it to negotiate but only allowing it to negotiate at 100. What's the difference with hard-coding it to 100 on the 6500?

Regards,

Ian

[Robert Ho]

I am familar with the command on the 2960G switch.

We are asking a question regarding the Cat6500 module. It does NOT support it.

Is there a module that does? A software version?

Thanks

[Leo Laohoo]

Hi Robert,

That's not right.  What IOS are you running?

Cisco Catalyst 6500 Series 48-Port 10/100/1000 RJ-45 Cisco Express Forwarding 720 Interface Module; field-upgradable to support distributed forwarding with the addition of the distributed forwarding daughter card

[Robert Ho]

The switch is running s72033-advipservicesk9_wan-mz.122-33.SXH8.bin with a WS-X6748-GE-TX (no DFC).

Cat6500#sh run int g2/45
Building configuration...

Current configuration : 191 bytes
!
interface GigabitEthernet2/45
switchport
logging event link-status
load-interval 30
shutdown
storm-control broadcast level 1.50
storm-control multicast level 1.50
no cdp enable
end

Cat6500#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Cat6500(config)#interface GigabitEthernet2/45
Cat6500(config-if)#spe
Cat6500(config-if)#speed auto ?
  <10-10000>  speed list separated by spaces (up to 8 values total)
 

Cat6500(config-if)#speed auto 100
Speed autonegotiation subset is not supported on this interface
Cat6500(config-if)#

Cat6500#sh mod 2
Mod Ports Card Type                              Model          
--- ----- -------------------------------------- ------------------ -----------
  2   48  CEF720 48 port 10/100/1000mb Ethernet  WS-X6748-GE-TX

[Leo Laohoo]

Thanks for the output.

I'm no expert on that blade but I've used the 6148 (I think) with PoE and this is where I first learnt of the command "speed auto 10 100".  I believe we were using the IOS SXH too.

I believe this blade will support 10/100/1000 Mbps if you hard code the setting.

[Robert Ho]

Yes, we can hard-code the port to 100/Full but problem is, we do not control the other end of the link (CPE).

As a result, there will be a duplex mismatch which can lead to a whole new set of problems.

[IAN WHITMORE]

I am familar with the command on the 2960G switch.

We are asking a question regarding the Cat6500 module. It does NOT support it.

Is there a module that does? A software version?

Thanks

My point was - you are to all intents and purposes hard-coding the 2960, so why not hard code the 6500 ?

OK, so you let it negotiate speed but only at 100... it should be simple to tell the other end (CPE) to hard code 100 FULL.

Sorry for not answering what you wanted I was only trying to help.

Regards,

Ian

[Robert Ho]

Ian - appreciate your response and help.

Yes, that nice command on the 2960G allowed the other end to negotiate up to 100Mbps, and without CPE intervention.

Having to communicate this to many existing customers and have them hard-code will not be pleasant. You know how that goes.

Moving forward, we have no choice but to hard-code the new connections and assure the CPE end is done at that time.