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:suda...@sibptus.tomsk.ru _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp