interconnect V1910(JE007A) and 1820(J9984A) on SFP fiber link

[Arkel]

Hi everyone,

I have issues between v1910 and 1820 switches.

Last day, a v1910 switch gave up (can't boot : fan go on and then the switch reboot non stop).

This switch was used to connect 2 places ( place A and place B, v1910 on each place) with fiber on SFP port.

I replace the faulty v1910 with à 1820(J9984A) but the 2 switches can't connect : no ping between these and no networking either.

However i have traffic w/o errors between them on SFP port (i see it in the 'statistics' of the 1820).

The IP address plan and settings remains the same.

The V1910 in place B use a vlan and a trunk on SFP port but i'm not sure it's significant ?

I don't think it's an IP or routing issue but perhaps i'm wrong ?

I don't have the SFPs ref for the V1910 and the 1820 at the moment but, as i say earlier, there's traffic between these two.

I confess i'm a bit confused by this...

Any idea or clue about this issue ?

PS: i'm not very efficient in English and sorry about that.

[Arkel]

Here are the ref for the SFP transceivers : 

_ On V1910 (the broken one and the on in place B) :

can't find the Jxxxx

just have SN: PH11070 Class1 21CFR1040.10LN#60 7/01

_ On the new 1820 : 

J4858D Aruba 1G SFP LC SX 500m MMF XCVR

And here a screenshot of the statistics on 1820 SFP port (interface 49 and 50 (this one is between place A and Place C, same as the one in place B no networking) :

The statistics of the SFP port linked with the V1910 on 1820 switch 

[akg7]

Hello @Arkel ,

Is 1820 switch ports connecting to switch B & C tagged port?

Is 1820 acting as later 3 or layer 2 switch?

If layer 2 then what is the vlan towards v1910 switch?

Thanks!

[Arkel]

Hi,

Thank you for your answer.

Is 1820 switch ports connecting to switch B & C tagged port?

All 1820's ports use the default configuration.

The 1820's SFP ports are connecting to switch B & C SFP ports and these ports are trunks.

The IP Network is the same for all the switches (xxx.xxx.121.xxx/24).

Switch C is xxx.xxx.121..251.

Switch B is xxx.xxx.121..252.

And the 1820 is xxx.xxx.121..253.

Is 1820 acting as layer 3 or layer 2 switch?

Not sure about that. I can't find a setting mentionning 'Layer 2' or 'Layer 3'.

I presume it's acting as layer 2 switch (no routing).

If layer 2 then what is the vlan towards v1910 switch?

Like i said before, i use default configuration on the 1820 (no vlan except the default one vlan=1).

Thanks for your time.

[akg7]

Hello @Arkel ,

Is it possible to provide current running config from 1820switch  and B or C switch?

Thanks!