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Problem in Trunking

High we have just bought alot of cat 500 switches for our access users. the problem we are facing is that we can not configure trunking btw a 375o and the Cat 500. is this a known isuue? do we need to change some thing or is it bc that the switch has some other problems (h/w or s/w).

Any help in this regard will be appriciated.

Regards.

10 REPLIES
Silver

Re: Problem in Trunking

Can you post the configs?

Thanks.

Silver

Re: Problem in Trunking

Hi Waqas

Can you please upload your configs from both the switch and router (That is 3750 you typed in your original post right?).

thanks in advance

Ajaz Nawaz

New Member

Re: Problem in Trunking

Thanks for your reply, and no i dont have the configurations, can you ppl provide me som sample config and also it is the 3750 series catalyst switch, i have never come across a 3750 series router.

regards.

Silver

Re: Problem in Trunking

You should do the following to configure a trunk port:

On cisco 3750:

interface gigabitethernet1/0/1

switchport trunk encapsulation dot1q (or isl)

switcport mode trunk

And that's all for basic configuration. Also if you want you can define the native vlan in case of dot1q

switcport trunk native vlan "vlan-id"

or set some security:

switchport trunk allowed vlan "vlan-id"

Bye

FCS

Please rate me if I helped.

Silver

Re: Problem in Trunking

Hi Waqas,

The 3750 switches are fully blown routers as well as traditional LAN based switches.

<http://www.cisco.com/en/US/products/hw/switches/ps5023/products_data_sheet0900aecd80371991.html>

The sample configuration documents which you should read are here:

<http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010f615.shtml>

BUT,

It would appear from initial read-up that the Cisco Catalyst Express 500 series of swithces does not support 'Trunking'. Etherchannelling has not much to do with trunking necessarily.

Take a look at the following url:

<http://www.cisco.com/en/US/products/ps6545/products_user_guide_chapter09186a0080531d82.html#wp116283>

hth,

Ajaz Nawaz

Silver

Re: Problem in Trunking

I don't think so that Cat 500 doesn't support Trunking, since it supports up to 32 VLANS and also has SFP slot.

Do you think that Cisco created a switch with SFP module support and only support one VLAN on it?

VLANs for grouping network users according to functions, teams, or applications, and regardless of the physical location of the network users. The switch supports up to 32 VLANs.

EtherChannels for bundling multiple Fast Ethernet or Gigabit Ethernet ports into a single logical link to create a higher bandwidth link between the switch and another switch.

EtherChannel can be deployed only over trunk link as I know.

Bye

FCS

Rate me if I helped.

Silver

Re: Problem in Trunking

Actually having read further on it does seem to support trunking using it's smartports:

<http://www.cisco.com/en/US/products/ps6545/products_data_sheet0900aecd80322aeb.html>

thanks for that,

Ajaz Nawaz

Silver

Re: Problem in Trunking

Yes, it supports.

As I understand to set the port to trunk you should use "Switch" smartport role.

Switch smartport role: Apply this role to ports that will be connected to other switches.

Bye

FCS

Rate me if I helped.

New Member

Re: Problem in Trunking

Can you please describe this in detail?

Silver

Re: Problem in Trunking

Please check the following page for further information:

http://www.cisco.com/en/US/products/ps6545/products_user_guide_chapter09186a0080531ea9.html

You can do this via web access....

Bye

FCS

Rate me if I helped.

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