[j-nsp] juniper cisco switch interconnection

[Mike Azevedo]

you can bcast storm your network to a halt if you are not careful. Use VSTP on juniper side to match the cisco PVST+. I believe Juniper's RSTP uses one instance of spanning tree over the physical network not an instance per vlan like cisco's implementation. I would also watch out for vlan 1. 



----- Original Message -----

From: "Benny Amorsen" <benny+usenet at amorsen.dk> 
To: "harbor235" <harbor235 at gmail.com> 
Cc: "Juniper List" <juniper-nsp at puck.nether.net> 
Sent: Monday, December 10, 2012 3:16:10 PM 
Subject: Re: [j-nsp] juniper cisco switch interconnection 

harbor235 <harbor235 at gmail.com> writes: 

> Has anyone connected a Juniper EX series switch with a Cisco switch (I have 
> a 3550)? 

Yes 

> Do you use a standard crossover cable? MDIX? 

I have only attempted 1Gbps, that just worked with a straight cable. 

> Any Layer 2 issues with RSTP and PVST+? 

It seems to work so far... 

> Any specific configuration required to make it work? 

Avoid VLAN 1. You can probably make VLAN 1 work if you try, but for me 
it was easier to simply not use it. 


/Benny 

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