R3与R4的IS-IS Level-1邻居没有建立。根据本图的信息，可能的原因是以下哪一项？[R3]display isis err rHell packet errors
:... ...
Repeated System ID : 0 Bad Circuit Type : 0
Bad TLV Length : 0 Zer H lding Time : 0
Unusable IP Addr : 0 Repeated IPV4 Addr : 0
Mismatched Area Addr(L1): 13 Mismatched Pr t : 0
SNPA C nflicted(LAN) : 0 Mismatched Level : 0
Mismatched Max Area Addr: 0 Bad Authenticati n : 0
... ...
[R3]
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