[j-nsp] Interface mirroring?

Neil Stirling neil.stirling at nortelnetworks.com
Wed May 21 16:33:50 EDT 2003


Use link aggregation - 802.3ad (MLT, EtherChannel etc..);

Use a 'virtual' Aggregated Ethernet interface - ae*.
You can also use Sonet interfaces, but I have never tried.

[edit interfaces]
ae0 {
    unit 0 {
        vlan-id 100;
        family inet {

[edit chassis]
aggregated-devices {
    ethernet {
        device-count 2; <- 2 in this case

[edit interfaces]
ge-1/3/0 {
    gigether-options {
        802.3ad ae0;

[edit interfaces ae0 ]
aggregated-ether-options {
    link-speed 1g;
    minimum-links 5;


-----Original Message-----
From: variable at ednet.co.uk [mailto:variable at ednet.co.uk]
Sent: 21 May 2003 14:29
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] Interface mirroring?

Hi all,

Quick question.  We're setting up an M-40 with 2 gig-e interfaces so that 
failure of either interface (or the switch its plugged into) doesn't mean 
the M-40 is unavailable.  We could setup VRRP between the interfaces, but 
there is about 20 (and growing) sub-interfaces that need to be failed over 
if one of the gig-e interfaces fail.

Is there an easier way to keep the two interfaces in sync other than 
editing both interfaces by hand everytime a change has to be made?



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