Strange issue with Eth5 in bridge mode

alphalt · August 6, 2009, 8:43am

Hi all,

I have set Eth2, Eth3, Eth4 and Eth5 in bridge mode and set bridge IP address to 128.16.0.254 (I use RB450G). So I connect my computer to either of ports and I can ping 128.16.0.254 without any problems. But if I connect PC to Eth5 I’m unable to ping 128.16.0.254 until I connect anything to ports Eth2, Eth3 or Eth4. How it can be possible ?

mrz · August 6, 2009, 8:47am

Works perfectly fine for me. Try to reset configuration to defaults and configure bridge again.

alphalt · August 6, 2009, 10:54am

Hi,

Re-creating bridge won’t help. After re-creation of bridge all ports refused to respond except Eth2. Then I just deleted ARP table in my PC and everything started to work fine.

JJCinAZ · August 6, 2009, 3:04pm

Because the mac address of the bridge is changing on use. Watch it with serial console while you plug and unplug ethernets. After that, assign a fixed admin-mac to the bridge.