VLAN for 2950T

[yhchooi]

Hi

I have configured a Cisco 2950T-24 with 3VLAN. My existing network has a Cisco 2948-L3 switch. The L3 switch is configured with ISL trunking.

I have 2 UTP cable connecting this 2 switches. When I tried to ping to the L3 from the 2950T, it failed.

My supplier told me that the 2950T only support IEEE 802.1q and it don't support ISL. Is that true? Anyway to workaround? It will be tedious to change the L3 and all other switches in my network to IEEE 802.1q.

Appreciate if someone could help me. Best Regards
YH Chooi

 

[ypswes]

There is no workaround:
Cisco says:

Important Notes
For Catalyst 2900XL/3500XL/2950 Switches:
Catalyst 2950 series switches only support 802.1q trunking. They do not support ISL trunking.

Currently, Catalyst 2900XL/3500XL switches do not support Dynamic Trunking Protocol (DTP). Thus, it is recommended that you use the nonegotiate option the other side of the trunk link as configured for the Catalyst 4000, 5000, and 6000 switches. This way, the XL switch port will not receive DTP frames that are unfamiliar to it.

sorry...

 

[yhchooi]

Mine.....

Is Cisco moving to IEEE 802.1q, staying away from ISL?
Best Regards
YH Chooi