Hello all, On my previous post I maked a mistake on my analyze. The bridge forward well any kind of frames it received. The problem was I used frame with VLAN. On Is-Is hello frame, the frame has an MTU greater than 1500 because of the 4 bytes VLAN enclosed. So all Is-Is hello packets were dropped. The architecture used is: eth1 (real physical interface) ---- BRIDGE ---- uml0 (tuntap interface to UML) I solve the this problem with the real interface by changing the mtu to 1520. But the issue remains on the virtual side. I can not modify the tuntap's MTU to something greater then 1500. Does someone know how I can do to change the mtu of the tuptap device ? In advance thanks. Sovatha PS: The MTU must not be lower than 1500 because the simulated Is-Is has to form topology with a real router where the interface MTU can not set to a value lower than 1500. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.osdl.org/pipermail/bridge/attachments/20050314/21c10b81/attachment.htm
