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Trunk connection between Cisco Cat.3650 and Enterasys C5

  • 26 August 2016
  • 7 replies

I have an Enterasys C5 that I need connected to a Cisco 3650 via trunk. (single fiber cable) I don't have as much experience on Enterasys so I was wondering if someone could help me out.
There isn't much on the Enterasys switch. All ports are default vlan 1. I am using port 48 on the Enterasys switch. I tried setting the egress on port ge.1.48 to vlan 1 but when I run "show egress ge.1.48" I get nothing in return.

The config on the Cisco switch is

interface GigabitEthernet1/0/48
switchport mode trunk
switchport trunk allow vlan 1,16,32,48,64,80,96,112,120,128,144,200
ip arp inspection trust
ip dhcp snooping trust

interface Vlan1
Ip address
Ip address secondary
No ip unreachable
No ip redirects
No shut

Enterasys :
ip address gateway

Not sure where to go from here.

7 replies

Userlevel 5
show port egress ge.1.48 should have the info you're looking for.
As you know all ports have port vid 1 out of the box and vlan 1 will egress untagged by default.

should you need to change to tagged
set vlan egress 1 ge.1.48 tagged

Thanks for that Mike. I entered the commands you reference and can't ping the gateway which is vlan 1 secondary on the 3650.
Userlevel 5
stuff to try:

verify link led at the port on the front of the C5 and the 3650.
In the c5 cli, use 'show port status' command to verify state.

if established, what does 'show port egress' report?
Use 'show vlan' output to review the information

can you plug in a laptop and ping through?
Userlevel 4
To complement Mike's suggestions, make sure you repeat the same command "set vlan egress 1 ge.1.48 tagged" for every vlan you have extended through the cisco switch (i.e. "switchport trunk allow vlan 1,16,32,48,64,80,96,112,120,128,144,200") so that both devices share the same configuration values.

Following is a list of additional commands that might assist you troubleshooting the issue:
->show mac port ge.1.48
->show vlan portinfo port ge.1.48
->show port egress ge.1.48
Userlevel 7

did you check the output of
show interface GigabitEthernet1/0/48 trunk[/code]on the Cisco?

The default spanning tree algorithms of the Cisco 3650 and Extreme C5 are different (PVST vs. MST). They are more or less compatible in common setups, but you should check the output of
show spantree stats active [/code]on the C5 and
show spanning-tree [/code]on the Cisco 3650.

I assume you did check the port status first, right?

show port ge.1.48 status [/code]Cisco IOS:
show interface GigabitEthernet1/0/48 status [/code]Br,
I don't think I have a layer 2 adjacency. I can see the MAC of the C5 on the Cisco port but can't see the Cisco MAC on the C5 port. When I do a "sho nei" on the C5 it lists the Cisco switch. Weird.
Found it. Spanguard had the port locked. Issued "set spantree adminedge ge.1.48 false" and gateway is now pingable from the C5. Connected a laptop to the C5, gave it a static in vlan1 and can ping the gateway across the C5 to the 3650.