[c-nsp] SFP, ZX and 12.2(18)SXE

[Hank Nussbacher]

We are trying to move a GigaE ZX from a pair of 7500s to a pair of 7600s 
and encountering a problem.

The 7500s run 12.0(25)S2, the 7600 run 12.2(18)SXE3 and 12.2(18)SXE4.  We 
moved one end with no hassle (7600 talking to 7500).  But when we move the 
2nd end of the link (7600 to 7600) the link won't come up.

The config is fairly standard on the 7500 (multicast and OSPF removed):
interface GigabitEthernet4/0/0
  description Med-1 dark fiber to GP1 (MACBAurs/001)
  ip address xxx.139.188.2 255.255.255.252
  no ip directed-broadcast
  ip mroute-cache distributed
  load-interval 60
  negotiation auto
  hold-queue 800 in
  hold-queue 800 out

1st 7600:
interface GigabitEthernet7/2
  description Med-1 dark fiber to GP0 (MACBAurs/001)
  ip address xxx.139.188.1 255.255.255.252
  ip route-cache flow
  load-interval 60

2nd 7600:
interface GigabitEthernet7/2
  description Med-1 dark fiber to GP1 (MACBAurs/001)
  ip address xxx.139.188.2 255.255.255.252

At

<http://www.cisco.com/en/US/products/hw/routers/ps368/products_configuration_guide_chapter09186a0080161136.html#wp1040549>

>"On Gigabit Ethernet ports, link negotiation exchanges flow-control
>parameters, remote fault information, and duplex information. Link
>negotiation is enabled by default.
>
>The ports on both ends of a link must have the same setting. The link will
>not come up if the ports at each end of the link are set inconsistently
>(link negotiation enabled on one port and disabled on the other port)."

1st 7600 (from sho int capab module 7):

GigabitEthernet7/2
   Dot1x:                 yes
   Model:                 WS-SUP720-3BXL
   Type:                  1000BaseZX
   Speed:                 1000
   Duplex:                full
   Trunk encap. type:     802.1Q,ISL
   Trunk mode:            on,off,desirable,nonegotiate
   Channel:               yes
   Broadcast suppression: percentage(0-100)
   Flowcontrol:           rx-(off,on,desired),tx-(off,on,desired)
   Membership:            static
   Fast Start:            yes
   QOS scheduling:        rx-(1p1q4t), tx-(1p2q2t)
   CoS rewrite:           yes
   ToS rewrite:           yes
   Inline power:          no
   SPAN:                  source/destination
   UDLD                   yes
   Link Debounce:         yes
   Link Debounce Time:    yes
   Ports on ASIC:         1-2
   Port-Security:         yes

2nd 7600:
GigabitEthernet7/2
   Dot1x:                 yes
   Model:                 WS-SUP720-3BXL
   Type:                  1000BaseZX
   Speed:                 1000
   Duplex:                full
   Trunk encap. type:     802.1Q,ISL
   Trunk mode:            on,off,desirable,nonegotiate
   Channel:               yes
   Broadcast suppression: percentage(0-100)
   Flowcontrol:           rx-(off,on,desired),tx-(off,on,desired)
   Membership:            static
   Fast Start:            yes
   QOS scheduling:        rx-(1p1q4t), tx-(1p2q2t)
   CoS rewrite:           yes
   ToS rewrite:           yes
   Inline power:          no
   SPAN:                  source/destination
   UDLD                   yes
   Link Debounce:         yes
   Link Debounce Time:    yes
   Ports on ASIC:         1-2
   Port-Security:         yes

Has anyone run into a bug that won't allow the 2 sides to come up in this 
kind of environment?  We have no yet played with the "[no] speed 
nonegotiate" command.

Thanks,
Hank