[j-nsp] Juniper-Cisco interco issue with speed nonegociate

[Benoit PLANTON]

Hi everyone,

Sorry if this is trivial for most of you but I'm beginner with Juniper devices, so here is my issue :

I have to interconnect my router J4350 (9.1R1.8) with a Cisco 7600 (another ISP)

The link between them is an optical fibre link (1000Base-SX).


The Cisco interface is configured with nonegociate speed and flow-control off.

On my Juniper I can only set the speed to 1g, link-mode full-duplex and disable auto-negociation.

The weird thing is that on the Cisco the port goes UP/UP but on my Juniper the port stay UP/DOWN. But if the cisco port is configured in autonegociation both ports go UP/UP.

Unfortunatelly I have to find a way to configure the Juniper and leave the Cisco config in nonegociate.



On the Cisco that I don't manage the configuration is

interface GigabitEthernet9/9
ip address x.x.x.109 255.255.255.252
no ip redirects
no ip proxy-arp
carrier-delay 2
speed nonegotiate
flowcontrol send off
storm-control broadcast level 1.00
no cdp enable
end



On the Juniper :

interfaces ge-1/0/4
speed 1g;
link-mode full-duplex;
gigether-options {
no-auto-negotiation;
}
unit 0 {
family inet {
address x.x.x.110/30;
}
}


Thanks for the help

--

[Matthew Walster]

Post by Benoit PLANTON
The Cisco interface is configured with nonegociate speed and flow-control off.
On my Juniper I can only set the speed to 1g, link-mode full-duplex and
disable auto-negociation.

I assume you've tried the obvious and doing:

gigether-options {
no-auto-negotiation;
}

Without setting the:

speed 1g;
link-mode full-duplex;

Just doing no-auto-negotiation by itself should work. Also make sure
RSTP is turned off on the port, it notoriously has a fit if PVST+ is
enabled on the Cisco side.

Matthew Walster