Interface sc0 is not all that relevant here as far as I recall. You need to
simply set the interfaces you connect to on each router to a similar trunk
mode (ISL vs dot1q etc) and things should happen naturally. Your sc0
interface is simply the management interface on the 5500 which should be
left in your management VLAN which is hopefully vlan 1. Keep in mind that
VLANS and Trunks etc are a layer 2 concept and do not involve or require IP
addressing. IP routing will certainly necessitate that you configure the
right subnets on each VLAN(broadcast domain) but the functionality of the
trunk itself is not dependant on that configuration.
HTH
Pete
*********** REPLY SEPARATOR ***********
On 5/2/2001 at 11:36 PM Rich Chang wrote:
>Dear CiscoGroupstudy.com
>
> I am having trouble getting the trunk up between a Cisco 7513 Router
> and a Cisco Switch 5500 so that VLAN's 10 and 20 can cross it. It may
> be because I can't set interface sc0 on the 5500 switch correctly.
>
> Assume VLAN 10 is 10.10.0.0/16 port 2/1 on Cisco 5500 switch
> VLAN 20 is 10.20.0.0/16 port 2/2 on Cisco 5500 switch
>
> Assume ISL Trunk 1/1 connected between 1/1 on Cisco 5500 switch to
> FastEthernet 3/0/0 to Cisco 7513 Router
>
> FastEthernet3/0/0.10 = 10.10.1.1
> FastEthernet3/0/0.20 = 10.20.1.1
>
> what should I use for the address for interface sc0 on the Switch?
>
> Interface sc0 determines port 1/1 address on the switch--
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