I am trying to setup a backbone area with an adjacent router using OSPF but I am getting the following error:
09:53:37 route,ospf,info OSPFv2 neighbor 172.26.4.2: state change from Exchange to 2-Way
09:53:38 route,ospf,info Discarding Database Description packet: Unsupported LSA type or wrong scope
09:53:38 route,ospf,info type=0x9
Can anyone shed any light on why this is happening. If I setup the same OSPF using Quagga then the neighbour relation starts fine, (quagga running on Openwrt inside Metarouter) basically confirming that the MTU is correct for OSPF.
On the OSFP Neighbour I see the following errors:
172.26.4.1 IP addr 172.26.4.1 neighbor FSM state has deteriorated.
2014-04-25T09:57:37+00:00 vShield-edge-4-0 routing[372]: [user.emerg] EXCEPTION 0x3e01-117: DB DESCRIPTION packet received with invalid master / slave bit.
2014-04-25T09:57:37+00:00 vShield-edge-4-0 routing[372]: [user.info] AUDIT 0x3e01-91: OSPF 1 An adjacency with a neighbor has gone down.
The question regarding the LSA type has already been answered…
I’m interested in the other error message you’ve got.
DB DESCRIPTION packet received with invalid master / slave bit.
This is interesting… Master/slave determination is done prior DB Desccription exchange in OSPF. And it’s purely to determine which of the neighbors will send the data first. In your case it seems like this phase was not done correctly and you’ve got that error. Have you changed any OSPF interface priority?
I have not changed anything. Just to update everyone, I have filed a bug with the “Other” router. it seems that it had an IPv6 address but that should not have been advertised. Our enginering team is working on it.