这是更多关于new diag的信息，我只负责搬运。。。

joeytian

DIAG is completely new.
) _6 C$ c- D& R( l& {0 b8 ^ DIAG 1
, [1 J- F+ ~! G# T Topology (I can't draw now.)
  ~  F+ Y$ \2 y' m
2 PC
4 }: [) _' ~' o     |
0 X' n. X* u( K" k, p- Z  _" s Switch
    |     |
R1  R2
0 @0 }: e8 n; }* t4 Y, ?9 {2 h   |          |
& ~; v9 }' ~" d& H2 U/ r R3  R4
    |         |
Server Farm

Customer just setup a IPv6 Network, with HSRPv6 on R1 & R2.
9 I" A0 R$ w' p$ i# C+ @. C) y/ a After setting up, all hosts lose connection.
) ^; F( N( y7 V What would you recommend to your L1 Engineer as a Quick Fix?

4 c7 j6 B, k" T9 Y) i 1.1) I answered shut R2's LAN port so that it will be a Single Gateway. (This is probably wrong)

0 Y% M$ F8 T+ N  e' F

* I then notice the PCs have a default route pointing to FE80::666 (Which is neither R1 or R2 address)

What do you think is the cause of the issue?

- N) }7 T; v  s( O+ Q! [+ }4 ~ 1.2) So I answered it is caused by a rogue device


  d. [- i7 Y0 {$ N5 O Which packet in the Packet Capture is the cause of the issue?

1.3) I can see FE80::666 sending MLD Listener, Router Solicitation, Router Advertisement
" ?7 Z4 f) ~5 W  a' {           I answered MLD Listener (Which is probably wrong again)


. u8 o* x  I9 C# i0 B
2 T. ?# [' l$ o- E I think it is a rouge device because I don't see any problems with the HSRPv6 config.
8 \) P# T! f6 E9 p( P$ B PCs are configured with "ipv6 enable", "ipv6 autoconfig"
The R1 have a "ipv6 nd-preference high" and R2 have "low" if I'm not wrong.
0 u. h! V, P! n0 D
5 r& m% c7 b: P9 m9 M3 f  ?  H' N0 X===================================
  m2 p" F0 p. o7 M: Z: W% jDIAG 2
5 e* n- X( G! P4 F: O9 F Site 1 (Hub/Server), Site 2 (Spoke), Site 3 (Spoke), Site 4 (Spoke)

.............S4
...............|
S1---Cloud----S3
...............|
.............S2

Site 2 loses multicast connection.
5 H- z6 J8 s0 J' G4 E& U+ f  h Site 3 not affected.
# W$ |. Z2 X4 b6 G. `" W! d
2.1) What do you think is the cause?
3 N2 _/ w# R# r% A2 D6 c 2.2) What questions would you ask your L1 engineer?
2 \3 y7 Q. z1 [7 i3 j7 I4 {# P2 ` 2.3) What actions would you recommend to fix the issue?

S1#sh ip int bri | e down
& l: u- ^* U9 r- z3 M* e; x7 x - e0/0, Lo0, S0/0, Tun 0 (I think)
* A, ^7 _& Y! E0 U3 t4 `& [( s* N* ~
$ b5 P3 r: r6 o7 A& r S2#sh ip int bri | e down
4 N4 I0 ?" T' |  @! g0 [ - e0/0, Lo0, S0/0
) r0 L2 d: O9 g9 A4 ~/ w0 [
* There are other show cmds as well such as "sh ip mroute" "sh ip pim int", where tun0 is not in S2 as well.

$ m0 p7 u; t5 Q+ W My answer:
2.1) Tun0 down
2.2) Ask L1 Engineer why Tun is not Up/Up
2.3) int tun 0, ip pim sparse
- L6 e8 w1 b9 b3 Y
=====================
0 L) L; k2 O! V) K" ?My results are out.
) p, m0 q% Q5 O! O4 a CFG - Pass
TS - Pass
DIAG - Fail 0% (So all my answers are wrong!)           
           
1 o( e; V: E2 k6 j  n/ [
& n% T7 r% j- b

chinese_ys

Copy and Paste? Good Job!!!

Rockyw

感谢楼主分享！

f13869230104

goutside

好像国人不太关心diag，哪个飞了，一样过不了

lasskill

看不懂！！！
% `' q8 Q) t1 J0 x

大饼

feifeirr

超赞，记忆力真好

C.C.I.E

joeytian

我怎么不能编辑了？

joeytian

/ N9 ~* M+ P- Z% U6 L5 z
how to update?====
这个就可以重新编辑更改，为什么主贴不能？ 想更新一下新DIAG， 怎么弄？

dannz

这是外国人，写的。。。。。人家英文好。。可以看一次，全部记忆下来。。

G-LAB燕菲

加油加油加油加油