[j-nsp] Dot1q trunking between 2 juniper EX3200 switches‏‏

Mon Feb 22 15:45:45 EST 2010

I’ve noticed that your email goes out twice. Also, without trying to peruse your configs (respectfully, I’m not JTAC), are you having a problem? Is something not working?

Me0 is not mandatory to manage the switch, but it is advised as an OOBM (Out Of Band Management) channel for management purposes.

As far as your Jumbo Frames, you might want to check the MTU settings on the connecting devices to these switches as well.

Dan Farrell

danno at appliedi.net<mailto:danno at appliedi.net>

From: Paul Waller [mailto:wallerp_7 at hotmail.com]
Sent: Monday, February 22, 2010 3:42 PM
To: Dan Farrell; juniper-nsp at puck.nether.net
Subject: RE: Dot1q trunking between 2 juniper EX3200 switches‏‏

I've only just started managing these switches so I don't know why flow-control is off & mtu not set higher.  I'm assuming mtu should be higher to allow some overhead on the packet.  I have noticed that there are quite a few gaint frames in the network.

Also do I need to use the me0 interface for management of the switch for access ?

For a better view I've attached the configs of both switches.

Regards
Paul

> From: danno at appliedi.net
> To: wallerp_7 at hotmail.com; juniper-nsp at puck.nether.net
> Date: Mon, 22 Feb 2010 11:01:20 -0800
> Subject: RE: [j-nsp] (no subject)
>
> I think your setup is configured in a workable manner (with the exclusion of RVI's, but you were referring to strict switching anyway and not L3 termination).
>
> The example from production I'll give uses AE (Aggregated Ethernet links, or multiple ethernet links bonded together) to form the link between the two switches, which then pass vlans across the switched path. You could substitute this for a regular physical interface. As you see, with the exception of a few choices, our configurations are similar-
>
>
> =====
> Switch-a
> =====
>
> # show interfaces ae0
> description "nap-r14-pub-1 - vlan 3914 - ge/0/0/46-47";
> mtu 9216;
> aggregated-ether-options {
> link-speed 1g;
> lacp {
> active;
> }
> }
> unit 0 {
> family ethernet-switching {
> port-mode trunk;
> vlan {
> members [ 3914 3951 2102-2149 hvpubn14 hvclustmgmt2 2150-2320 2321-2349 ];
> }
> }
> }
>
> {master:1}[edit]
>
> =====
> Switch-b
> =====
>
> # show interfaces ae0
> mtu 9216;
> aggregated-ether-options {
> lacp {
> active;
> }
> }
> unit 0 {
> family ethernet-switching {
> port-mode trunk;
> vlan {
> members [ 3914 3951 2102-2149 hvpubn14 hvclustmgmt2 2150-2320 2321-2349 ];
> }
> }
> }
>
> [edit]
>
>
>
> 1) establish the unit0 subinterface as a trunk port
> 2) designate the vlan membership
> 3) be sure you've done this on both sides.
>
> I noticed in your setup you turned off flow-control. Is there a specific reason you did that? We run iSCSI sans for hundreds of VPS' and we leave it on (by default). Also, we run 9216 MTU for better performance on these links.
>
>
> Dan Farrell
> danno at appliedi.net
>
>
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Paul Waller
> Sent: Monday, February 22, 2010 5:25 AM
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] (no subject)
>
>
> Hi all,
>
> Sorry but abit of a novice when it comes to layer2 switching and Juniper switches.
>
> What I think I need to do is trunk between 2 junipers EX3200 switches, int g0/0/0 connects to the router & int g0/0/1 connects to the other juniper. 1 switch will trunk between between the junipers & then have a trunk port to the router. It is only for 2 vlans, voice & data. If anyone has a config snippet on how I do this it would be appreciated.
>
> router <-------->switch 1<-------->switch 2
>
> My config of switch 1:
>
> interfaces {
> ge-0/0/0 {
> apply-macro juniper-port-profile {
> Desktop;
> }
> description "Wan Router";
> mtu 1514;
> ether-options {
> auto-negotiation;
> no-flow-control;
> link-mode automatic;
> speed {
> auto-negotiation;
> }
> }
> unit 0 {
> family ethernet-switching {
> port-mode trunk;
> vlan {
> members [VOICE-VLAN DATA-VLAN];
> }
> }
> }
> }
> ge-0/0/1 {
> apply-macro juniper-port-profile {
> Desktop;
> }
> description "Connection to Juniper switch EX3200";
> mtu 1514;
> ether-options {
> auto-negotiation;
> no-flow-control;
> link-mode automatic;
> speed {
> auto-negotiation;
> }
> }
> unit 0 {
> family ethernet-switching {
> port-mode trunk;
> vlan {
> members [VOICE-VLAN DATA-VLAN];
> }
> }
> }
> }
>
>
>
> Switch 2 trunk config:
>
> ---------------------
>
>
>
>
>
>
>
> ge-0/0/0 {
> apply-macro juniper-port-profile {
> Desktop;
> }
> description "Connection to Juniper switch EX3200";
> mtu 1514;
> ether-options {
> auto-negotiation;
> no-flow-control;
> link-mode automatic;
> speed {
> auto-negotiation;
> }
> }
> unit 0 {
> family ethernet-switching {
> port-mode trunk;
> vlan {
> members [VOICE-VLAN DATA-VLAN];
> }
> }
> }
> }
>
>
>
> Regards
> Paul
>
>
>
>
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