Chris,
I hate these kinds of replies, but it may help nonetheless
I've not worked with the Cisco 3650, but in my experience with other
Catalyst platforms, such as the 29xx and 35xx, the 'native' VLAN had to
be modified on the Cisco side to some non-extistent VLAN, thanks to
Cisco's VLAN1 designation of 'untagged'. In Juniper-world (and pretty
much everyone else), there's no concept of an 'untagged' VLAN:
interface GigabitEthernet0/1
switchport
no ip address
switchport trunk encapsulation dot1q
switchport trunk native vlan 1000
switchport mode trunk
!
The VLAN1000 is a VLAN that exists solely on the Cisco switch and is not
used for anything at all. It could possibly be used for a back-end
management VLAN, of course, but cannot be trunked to
non-Cisco-"compliant" devices, AFAIK.
-evt
Message
From: juniper-nsp-bounces (AT) puck (DOT) nether.net
[mailto:juniper-nsp-bounces (AT) puck (DOT) nether.net] Behalf Hyunseog Ryu
Sent: Tuesday, January 17, 2006 10:10 AM
To: Chris Davies
Cc: juniper-nsp (AT) puck (DOT) nether.net
Subject: Re: [j-nsp] Juniper M7i & Cisco 3650 vlan configuration
difficulties
Since you configured Juniper side as dot1q, you should configure Cisco
port as dot1q.
Here is the example for Cisco 3650 configuration.
interface GigabitEthernet0/1
switchport
no ip adress
switchport trunk encap dot1q
switchport trunk encapsulation dot1q
switchport mode trunk
exit
interface vlan2
ip address x.x.195.250 255.255.255.252
This will do it.
Hyun
Chris Davies wrote:
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? , 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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