Information Technology Reference
In-Depth Information
•
Verify that you cannot
ping
from switch to switch.
•
Configure the same VTP domain name in each switch.
•
Enable trunking between the switches.
•
Verify that the switches are trunking over their link.
•
Ping from switch to switch.
Step-by-Step
The following steps are performed on the console of a Catalyst 5K switch.
Make certain that the ports you have decided to use support ISL trunking. Several types of Ethernet
interfaces support ISL trunking. 10BaseT (common Ethernet) ports do not support trunking; most
100BaseT (Fast Ethernet) ports do.
Use the
show port capabilities {module_number}|{module_number/port_number}
command on
both switches to determine whether the ports that you are using support ISL. In this example, note that
the port designator 1/1 has been specified at the end of the command. This limits the response to the
information directly applicable to port 1/1.
Step 1
Switch-A>
show port capabilities 1/1
Model WS-X5530
Port 1/1
Type 10/100BaseTX
Speed auto,10,100
Duplex half,full
Trunk encap type ISL
Trunk mode on,off,desirable,auto,nonegotiate
Channel 1/1-2
Broadcast suppression percentage(0-100)
Flow control no
Security yes
Membership static,dynamic
Fast start yes
QOS n/a
Rewrite no
UDLD Not capable
Switch-A>
Connect the two switch ports using the Ethernet crossover cable. In this example, Switch A's 1/1 port is
connected to Switch B's 1/1 port.
Step 2
Verify that the ports are operational by entering the
show port 1/1
command on Switch A. You should
see that the status shows “connected.”
Step 3
Switch-A> (enable)
show port 1/1
Port Name Status Vlan Level Duplex Speed Type
----- ------------------ ---------- ---------- ------ ------ ----- ------------
1/1 connected 1 normal a-full a-100 10/100BaseTX
Switch-A> (enable)
