Ethernet Switching
Ethernet Switching

SFP-T in EX2300 on 18.4R1

[ Edited ]
‎03-21-2019 06:46 AM

I have problem with SFP-T modules in EX2300 uplink ports.

They are properly detected in chassis hardware with a name and s/n but the logical link is down so I can't pass any traffic throught it.

Weird thing is that the link on other side in EX2200 physical port comes up when I connect the cable and it blinks as it were passing some traffic but on EX2300 uplink side the LEDs for power and traffic are off.

 

I have a batch of SFP-T modules (non-Juniper but programmed for it) which works till you reboot the switch after which you need to re-attach them physically to make them function properly.

 

I have original SFP-T modules and few other from different vendors and even those programmed for Cisco. All of them are working fine with older hardware EX2200/EX3300 but not on ELS hardware EX2300/EX3400.

 

Maybe someone stumbled on this problem and solved it as I don't really have any idea why this happens and how to solve this.

6 REPLIES 6
Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎03-21-2019 07:19 AM

Hi Looki,

 

Please check if auto-negotiation settings on both sides are the same.

 

If they are same and issue still seen, you might try following:

If it is enabled on both sides, please try to dsiable it, alternatively try to enable it.

 

Regards,

Roman

Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎03-21-2019 07:28 AM

Hello Looki,

 

I'd recommend you to use the recommended Junos 18.1R3 (or 18.1R4): 
https://kb.juniper.net/InfoCenter/index?page=content&id=kb21476  

 

Also found this issue where 18.4R1 is already slated to be removed from the "Resolved In" list:

https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1360602

 

It'll be great if you share your feedback so others can benefit from your post.

 

Hope this helps.

Regards,
-r.

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Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎03-21-2019 08:14 AM

Hi mriyaz,

 

I will try to install 18.1R3-S3 as by KB it fixes some problems with EX2300 and maybe it will work with SFP-T.

 

I wanted to make it run on 18.4R1 cause from this version dhcp snooping and private vlans are working but I think the version is problem as in a mean time I downgraded to 15.1X53-D590 and SFP-T started working.

 

Thanks for that PR link but it's a bit missleading cause it states that the issue is resolved in 18.4R1 which I can for sure say it isn't.

 

BTW, I have a few SFP-T and done all things I can imagine on them as disabling auto-negotiation on both end, on one of them, putting speeds to 1g and full-duplex and nothing worked.

Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎03-21-2019 08:44 AM

Confirmed, it is working fine on Junos 18.1R3-S3.8 with different SFP-T (even those programmed for Juniper).

Tried even restarting it and they still went up fine and transmitted the traffic.

 

Do you maybe know when this issue will be resolved in 18.4 to have the function of dhcp snooping with SFP-T working?

Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎03-21-2019 08:51 AM

Hi Looki,

 

That's good news then we got the PR right.  Its best if you take the PR and check with JTAC for the correct 18.4 release slated to fix this.  

 

Hope this helps.

 

Regards,
-r.

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

If this solves your problem, please mark this post as "Accepted Solution."
Kudos are always appreciated Smiley Happy.

Ethernet Switching

Re: SFP-T in EX2300 on 18.4R1

‎09-17-2019 01:18 AM

I got similar issue, we are running junos 18.4R2.7 and using multirate 10/100/1000 SFP-T.

When set the speed into 1G, all working. but when we set the speed itu 10M or 100M, the link is "up  up" but the traffic or ping can't be passing through.

Any new bugs for this issue?

 

root> show interfaces ge-0/2/0 terse
Interface Admin Link Proto Local Remote
ge-0/2/0 up up
ge-0/2/0.0 up up eth-switch

{master:0}
root> show interfaces ge-0/2/0
Physical interface: ge-0/2/0, Enabled, Physical link is Up
Interface index: 672, SNMP ifIndex: 562
Description: TEST PORT MULTIRATE 100
Link-level type: Ethernet, MTU: 1514, LAN-PHY mode, Link-mode: Full-duplex,
Speed: 100mbps, Duplex: Full-Duplex, BPDU Error: None,

 

oot> show interfaces irb.100 terse
Interface Admin Link Proto Local Remote
irb.100 up up inet 10.10.10.1/24

 

root> ping 10.10.10.2
PING 10.10.10.2 (10.10.10.2): 56 data bytes
^C
--- 10.10.10.2 ping statistics ---
9 packets transmitted, 0 packets received, 100% packet loss

{master:0}
root> show ethernet-switching table vlan-id 100

{master:0}