I am trying to setup a bgp session between two unit CCR1036-12G-4S running latest 6.12 ROS. The BGP is run over L2TP tunnel between the devices. It connects successfully and passing prefixes, however after about 1min, it will get disconnected with error “Malformed Attribute List”.
Not sure what would be causing it…might try downgrading and see if it re-appears. Here is what that error message means:
6.3 UPDATE message error handling.
All errors detected while processing the UPDATE message are indicated
by sending the NOTIFICATION message with Error Code UPDATE Message
Error. The error subcode elaborates on the specific nature of the
error.
Error checking of an UPDATE message begins by examining the path
attributes. If the Total Attribute Length is too large (i.e., if
Total Attribute Length + 21 exceeds the message Length), or if the
(non-negative integer) Number of Network fields cannot be computed as
in Section 4.3, then the Error Subcode is set to Malformed Attribute
List.
narrow down the problem to be filter issues, fixed by doing the filtering on the sending side instead of receiving, but still not sure what caused this.
Interesting…how many prefixes were you sending/receiving?
The other side is sending full bgp route~500k and receiving side just need ~20 prefixes