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本帖最后由 小乔 于 2017-8-21 15:19 编辑 ; @, Y# k7 z( c" C: s5 c
" w' G' W3 f: T3 W! t' T7 T3 NQ.1. debug ospf neighborhood adjacency
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) {9 o+ v9 ~* d! u6 I Gdebug ip ospf adj
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1 _* ?0 U+ [3 d4 YQ.2. check eigrp timers
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/ U' K- i% B- P6 O( c1 kshow ip eigrp interfaces detail" U( e) ]8 c0 r: _& J! Y/ P
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2 V+ S8 Z3 e F+ aQ.3. traceroute/icmp ( type 3 code 3)- p' ^& I+ _3 F
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( O6 h- b$ M5 X( ?Port unreachable or destination unreachable
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Q.4. Two routers are connected through PPP connection. After the PPP was established the admin put OSPF running above it. The OSPF formed adjacency but after soon the adjacency dropped. What is the reason?
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GRE tunnel destination MUST not BE reachable through the tunnel
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