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" <[email protected]> To: "harbor235" <[email protected]> Cc: "Juniper List" <[email protected]> Sent: Monday, December 10, 2012 3:16:10 PM Subject: Re: [j-nsp] juniper cisco switch interconnection harbor235 <[email protected]> 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 _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp

