SSG20 to Cisco 1800 on SFP Mini Physical Interface Module
I'm having a problem trying to connect the above devices.
I have installed a JJXM-1SFP-S 1 port Mini Physical Interface Module into an SSG20, but when I try connect it to a Cisco 1800, I cannot get the line protocol to come up on the 1800. The SSG20 shows UP. Is there something I am doing wrong with the sfp module ? I had configured the sfp at 100/full as requested by the MPLS provider, ip with /29 and created new zone and assigned the SFP to it, but no joy.
I had to connect the SSG to the 1800 for a customer... the 1800 is terminating an MPLS network. I connected the 1800 to port e0/0 on the SSG to see if the it was the Cisco device using same config as above, and it came up no problem. The temporary port e0/0 is set aside for a future use in the coming weeks so I cannot leave the 1800 terminated to it
I also have several other sites to configure using the same sfp modules, connecting to a range of Cisco devices, ME3400's, 1800's etc.
If anyone has any ideas I would be very grateful if you could pass them on.
Link negotiation properties for SSG Gig fiber interfaces on PIM's: JXM-1SFP-S, JXU-6GE-SFP-S, JXU-1SFP-S
This article contains information about link negotiation issues that might arise when interconnecting SSGs with 3rd party devices using 1Gbps fiber interfaces with part numbers JXM-1SFP-S, JXU-6GE-SFP-S, or JXU-1SFP-S . It also contains configuration suggestions in order to work around the problem.
Problem or Goal:
When interconnecting SSG devices using one of the interface cards listed above with 3rd party devices it could happen that the link doesn't come up. On the SSG side the link is UP but on the other side link is DOWN.
The interface cards JXM-1SFP-S, JXU-6GE-SFP-S, JXU-1SFP-S do not support auto negotiation as per IEEE 802.3 standard for 1000Base-X interfaces. The behavior is the same for any ScreenOS version up to version 6.2. Therefore it's necessary to disable auto negotiation options in the 3rd party device otherwise it will consider that auto negotiation failed and won't bring the link UP.
The duplex mode needs to be set to "Full" and auto negotiation needs to be disabled.
With ScreenOS 6.3 and later this problem can be solved by enabling auto negotiation with the command "set interface ethx/y phy auto".
Steve Puluka BSEET - Juniper Ambassador IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP) http://puluka.com/home
Re: SSG20 to Cisco 1800 on SFP Mini Physical Interface Module
DO you know if there is any way to step the SFP modules down to 100/Full. The vendor equipment I am connecting to is in fact all only 10/100 capable, hence the links won't come up.
Also, have you ever encountered the below problem(I will put up a seperate post on this forum also. Basically, when I installed one of the SPF modules into an SSG20 and powered it up, it kept stopping after the image was loaded:
Juniper Networks, Inc SSG5/SSG20 System Software Copyright, 1997-2006
Version 6.1.0r5.0 Load Manufacture Information ... Done
Initialize FBTL 0........ Done Load NVRAM Information ... (6.1.0)Done Install module init vectors ---- switch reset time (ms): 10 ----
I tried another card and had the same problem, yet the card worked in the adjacent slot and other SSG20's. I tried to reset the unit via the RESET switch on the back, but had no luck.