R3与R1的IS-IS邻居没有建立,根据如下信息,可能的原因是?[R3]display isis error
Hello packet errors: … …
Repeate System ID :17 Bad Circuit Type :0
Longer packet :0 More Area Addr :0
Longer Area Addr :0 Bad Area Addr TLV :0
More IF Addr :0 Bad Formatted IF TLV :0
Mismatched Area Addr(L1) :0 Mismatched Proto :0
SNPA Conflicted(LAN) :0 Mismatched Level :0