[j-nsp] Switch mesh / VRRP question

Jonathan Brashear jbrashear at hq.speakeasy.net
Wed Apr 16 08:57:23 EDT 2008


In my experience, Juniper doesn't allow the same subnet to be assigned
to multiple _physical_ interfaces.

Network Engineer
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> jbrashear at hq.speakeasy.net 
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-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Campbell, Alex
Sent: Wednesday, April 16, 2008 1:58 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] Switch mesh / VRRP question

Hi all,

I'm having trouble figuring out how to use VRRP with two routers fully
meshed to two switches.

To achieve this, is it possible to have two interfaces on the same
router with virtual IPs on the same subnet?  I'm thinking it would look
like the config below but I am not sure if this would work.

Regards,

Alex


#router1

ge-0/0/0 {
    description "Uplink to switch1";
    link-mode full-duplex;
    unit 0 {
        family inet {
            no-redirects;
            address 10.0.0.2/23 {
                vrrp-group 1 {
                    virtual-address 10.0.0.1;
                    priority 20;
                    preempt;
                }
            }
        }
    }
}
ge-0/0/1 {
    description "Uplink to switch2";
    link-mode full-duplex;
    unit 0 {
        family inet {
            no-redirects;
            address 10.0.0.3/23 {
                vrrp-group 1 {
                    virtual-address 10.0.0.1;
                    priority 20;
                    preempt;
                }
            }
        }
    }
}

#router2

ge-0/0/0 {
    description "Uplink to switch1";
    link-mode full-duplex;
    unit 0 {
        family inet {
            no-redirects;
            address 10.0.0.4/23 {
                vrrp-group 1 {
                    virtual-address 10.0.0.1;
                    priority 30;
                    preempt;
                }
            }
        }
    }
}
ge-0/0/1 {
    description "Uplink to switch2";
    link-mode full-duplex;
    unit 0 {
        family inet {
            no-redirects;
            address 10.0.0.5/23 {
                vrrp-group 1 {
                    virtual-address 10.0.0.1;
                    priority 30;
                    preempt;
                }
            }
        }
    }
}

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