[j-nsp] Juniper M7i & Cisco 3650 vlan configuration difficulties

[Scott Morris]

"no switchport" turned off the L2 functionality of that port on your switch.

Use:

Switchport
Switchport trunk encapsulation dot1q
Switchport mode trunk

If you then need your 3650 to have IP addresses on individual vlans you will
use the "interface vlan (#)" command and configure all of the L3 information
under these logical ports.

Get back to the basics!

HTH,

Scott


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Chris Davies
Sent: Tuesday, January 17, 2006 6:07 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] Juniper M7i & Cisco 3650 vlan configuration difficulties

I've got a Juniper M7i and a Cisco 3650.  I need to run vlan-tagging on the
interface that connects the two due to another piece of hardware which
requires it.

Juniper:

     ge-1/3/0 {
         description "Aggregate LAN";
         vlan-tagging;
         link-mode full-duplex;
         unit 0 {
             vlan-id 2;
             family inet {
                 address xx.xx.195.249/30;
             }
         }
     }

Cisco:

interface GigabitEthernet0/1
  no switchport
  ip address x.x.195.250 255.255.255.252

As soon as I add the vlan-tagging to the gigE port on the Juniper, the two
units cannot communicate.

I also tried to configure the GigE port on the cisco as

interface vlan 2
   ip address x.x.195.250 255.255.255.252 interface GigabitEthernet0/1
   switchport access vlan 2

However, that also does not work.  Cisco's vlan is an internal designation,
not 802.1q.

If I try to turn on 802.1q encapsulation:

#switchport trunk encapsulation dot1q
Command rejected: Gi0/1 not a switching port.

#switchport encapsulation dot1q
Command rejected: Gi0/1 not a switching port.

Is there a way to configure a port so that the primary interface doesn't
require vlan tagging, but a secondary interface does?  Or, is there a way to
assign two other IPs as VLANS that are not attached to an interface but are
able to be reached through a direct IP address?

Thank you.
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