We are having some odd behavior with our Cisco 7902/7905 phones on our Juniper network. The Cisco 7902/7905 phones will sporadically work and not work. Below is the configuration on the Juniper side, I am hard setting the Admin VLAN on the Cisco phones. Our Cisco 7940 phones are working perfectly. The 7902/7905's are only 10BASE-T but I cannot hard set the phone side, if I leave both sides at AUTO then it seems we have even more problems. Ideas?
ge-0/0/7 { description Phone; ether-options { no-auto-negotiation; no-flow-control; link-mode full-duplex; speed { 10m; } } unit 0 { family ethernet-switching { port-mode access; vlan { members Voice;
Are you sure you're not coming across an LLDP-MED issue? I could be wrong, but I believe natively the 7902/5 supports CDP. Others have had success upgrading the firmware on the phone (see link). I hope this helps.
The phones are all at the latest Cisco firmware. When the 7902's don't work the red/green lights flash on it and there is no dial tone. Then if I put the handset back on the base wait a few minutes it will sometimes work again. Then if I pick it up it will go dead and the lights will flash.
On the 7905's I will randomly get an "ethernet disconnected" message on the display.
When I leave the switch interface at auto neg, the port will come up as 10m half duplex. There is no way to hard set the speed/duplex on the 7902/7905 phones. And I know I might be causing a problem having each side set differently, but it's the only way they stay at 10m full duplex.
