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网络小学徒

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楼主 |
发表于 2018-1-25 17:42:03
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general steps for troubleshooting,1 L* Y( B; f: d7 { L( B* P: L
1) on clients, ipconfig to check the IP and gateway.
, r+ `: `& A5 [, j: Q if IP is 169. something link local address, please trouble shoot DHCP or check the path to reach DHCP.
% l' Y q+ ?/ b- O( X3 }) R9 l/ Q the possible faults: 1) access port or layer2 path to reach DHCP 2) dhcp helper address in vlan10 interface 3) DHCP server configuration.# |4 _ o! ]9 c* q, `. a- r$ W
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2) on client1 and client2, do the same as step 1). then ping each other.
* Q" K3 g+ q1 x! H" T1 Q if here failed, then directly connected switches something wrong 1 a: p5 H6 g V
possible fault 1) switch port down or switch mode trunk by mistake.& s7 N& [6 v2 _6 H4 q
R; h( A: G. S9 R" W& w2 |$ e; e3) if 1) and 2) both success, then upstream somewhere wrong.
6 }2 b1 p3 |% j4 R3 h6 C9 ?/ c' n g the recommended steps: & \+ U% S: U8 w( ^" T; y! v9 f
show layer3 topology, then ping each hop's ingress and egress IP until one hop ping failed.! T0 q( \. ?0 w5 F% T# i
then that is where you need dig. in my first ticket, i stuck for 40 minutes then found the issue... 3 U2 ?+ y1 O. [1 `: D
as a tip, you may try to choose the different ticket option to see what is listed in the option candidate, good hints for your own troubleshooting.% e# _ M% i1 j# d' f# X
4 q" o4 a+ Q! a8 Uplease pay attention 'tag' function to avoid redistribute loop in mutual redistribute.
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honestly, i did not join any training nor simulator. so tough to tell how much changed in the exam.
9 p b" c! v2 bbut the steps above really helped me.4 g4 ~' x( C6 k) ?5 Z9 _
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good lucks! |
9#
2018-1-25 17:42:03
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