[j-nsp] loop detection on EX4200

[Dave Bell]

You could try enabling bpdu-block-on-edge.

http://www.juniper.net/techpubs/en_US/junos12.2/topics/task/configuration/spanning-trees-bpdu-block-cli.html

Regards,
Dave
On 21 Apr 2014 05:56, "Victor Sudakov" <vas at mpeks.tomsk.su> wrote:

> I have just had a funny experience on an EX4200 switch.
>
> An Avara ENT100 multiplexer is connected to ge-0/0/22 on the
> EX4200. By mistake, an E1 port on the ENT100 was physically looped.
> This resulted in an Ethernet loop in all the vlans which were active
> on the ge-0/0/22 port, which the EX4200 was unable to prevent.
>
> Cisco switches can detect such conditions by sending special loopback
> keepalives (Ether type 0x9000) and put the interface into errdisabled
> state. Is there a similar feature in Juniper switches?
>
> Thank you for any input.
>
> --
> Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
> sip:sudakov at sibptus.tomsk.ru
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