topic Re: ICX 7150 connecting to ICX 7850 in ICX Switches

ICX 7150 connecting to ICX 7850

kk1313 — Mon, 01 May 2023 13:15:11 GMT

Hello,

I have an ICX 7850 (08.0.95g) as my distributed core. I can connect 7250s just fine, but I cannot link 7150s (08.0.95g). I've tried the connection with both multimode and single mode. The sfp modules match, the speed-duplex matches, the vlan's match. The media is validated on both ports. Any ideas here?

Re: ICX 7150 connecting to ICX 7850

BenBeck — Mon, 01 May 2023 13:23:00 GMT

Are either of the ports up at layer 1? (show int eth x/y/z)

Also, what are the exact switch models/modules/ports being used?

If we are never coming up at layer 1, it generally (but not always) points to media (optics, fiber, patching, etc.). There are occasionally exceptions with certain modules/ports.

Re: ICX 7150 connecting to ICX 7850

kk1313 — Mon, 01 May 2023 13:28:11 GMT

Exact models are 7850-48F and 7150-c08p. (Though I've tried this with 7150-12p and 10p with same results.)

The port on the 7850 will go from listening to forwarding with LEDs coming on the front panel. The port on the 7150 will remain in blocking.

For the 7850:

Port Supported Vendor Type
----------------------------------------------------------------------
2/1/35 Yes RUCKUS Type : 1GE M-SX(SFP)

for the 7150:

Port Supported Vendor Type

----------------------------------------------------------------------

1/2/2 Yes RUCKUS Type : 1GE M-SX(SFP)

Re: ICX 7150 connecting to ICX 7850

BenBeck — Mon, 01 May 2023 13:37:41 GMT

So it is up for sure on 7850 side. What does 'show int e x/y/z' look like on 7150 side?

Re: ICX 7150 connecting to ICX 7850

kk1313 — Mon, 01 May 2023 13:42:53 GMT

show int e 1/2/2

GigabitEthernet1/2/2 is down, line protocol is down
Port down for 4 hour(s) 23 minute(s) 0 second(s)
Hardware is GigabitEthernet, address is c803.f51b.bc8d (bia c803.f51b.bc8d)
Configured speed 1Gbit, actual unknown, configured duplex fdx, actual unknown
Configured mdi mode AUTO, actual unknown
Untagged member of L2 VLAN 1, port state is BLOCKING
BPDU guard is Disabled, ROOT protect is Disabled, Designated protect is Disabled
Link Error Dampening is Disabled
STP configured to ON, priority is level0, mac-learning is enabled
MACsec is Disabled
Flow Control is config enabled, oper enabled, negotiation disabled
Mirror disabled, Monitor disabled
Mac-notification is disabled
VLAN-Mapping is disabled
Not member of any active trunks
Not member of any configured trunks
No port name
IPG MII 96 bits-time, IPG GMII 96 bits-time
MTU 1500 bytes
MMU Mode is Store-and-forward
300 second input rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
300 second output rate: 0 bits/sec, 0 packets/sec, 0.00% utilization
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 multicasts, 0 unicasts
0 input errors, 0 CRC, 0 frame, 0 ignored
0 runts, 0 giants
0 packets output, 0 bytes, 0 underruns
Transmitted 0 broadcasts, 0 multicasts, 0 unicasts
0 output errors, 0 collisions
Relay Agent Information option: Disabled
Protected: No
MAC Port Security: Disabled

This port is not being monitored for queue drops
Egress queues:
Queue counters Queued packets Dropped Packets
0 0 0
1 0 0
2 0 0
3 0 0
4 0 0
5 0 0
6 0 0
7 0 0

Re: ICX 7150 connecting to ICX 7850

BenBeck — Mon, 01 May 2023 13:52:40 GMT

Down at layer 1. Could you try this?

ICX(config-if-e10000-1/2/2)#gig-default neg-off

Re: ICX 7150 connecting to ICX 7850

kk1313 — Mon, 01 May 2023 14:03:52 GMT

That seems to have done the trick! Can you explain why that is?

Re: ICX 7150 connecting to ICX 7850

BenBeck — Mon, 01 May 2023 14:11:42 GMT

Nice! I believe that fiber port does not have auto-neg capability. That command is basically forcing it to listen to configuration.

Re: ICX 7150 connecting to ICX 7850

kk1313 — Mon, 01 May 2023 14:18:03 GMT

Ah, well then that would make sense. Thanks so much for the assistance. This worked on my test environment, now I can try it on my production switches.

Out of curiosity: I see in the documentation that "When Gbps negotiation mode is turned off (using the gig-default neg-off command), the device may inadvertently take down both ends
of a link. This is a hardware limitation for which there is currently no workaround."

How likely is this to happen?

Re: ICX 7150 connecting to ICX 7850

BenBeck — Mon, 01 May 2023 14:25:51 GMT

No problem at all. I think that is a warning if your link is already up this command could bring it down as you are disrupting any prior negotiation. You could also see a flip at initial configuration, but it will come up if configured properly.