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助理工程师
 
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发表于 2018-9-28 12:07:06
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so , 2018.9.05 has a different answer, C, DHCP issue. Which one is correct? I don't think the question any differently.
# |/ p8 [) t( J( P# x0 A% i @% F
) A6 r) N& g7 F! F' z. a5 Q/ [9 `2 E8 y% K6 _; c1 G: H
R5 configuration :- W. O# D. u9 S2 } H
int gig0/0& v3 U6 W( d* W$ p
ip address dhcp3 b/ ~& D9 M% e# _* |! H) b
This interface not getting dhcp ip address from R4. So even though OSPF configuration was like 0.0.0.0
! D. Z5 {7 m: Q- x, C: s% Q0.0.0.0 area 0 , because this interface does not get correct ip address from DHCP it can’t participate in& O u2 ^3 I# u# i" A$ M
OSPF.
$ H$ X1 x( c$ z& O ?R4 configuration :-9 E; T2 f6 f# J* a) P; J" y' s
ip dhcp exlude address; g" A, d$ o/ {4 Q3 z
ip dhcp pool ine8 K5 s! ^) ]% _
network x.x.x.x x.x.x.x6 S8 e3 ~+ ~7 I F1 L c
i think default router command was missing here . not sure8 q1 }) h% P0 u! r' F' s
but
# O% [$ O2 f& A6 a/ t' \$ bInt gig0/0
8 Q u* m# C3 y6 Jip address dhcp .
0 s3 V" M! c7 u* q1 n+ EThis interface on R4 should have ip address configured on it instead of ” ip address dhcp ” . Hence its not( ?+ X) [9 }+ S
able to provide dhcp lease address to R5.: L! @1 |# h0 t4 |3 Q! x
R4 also had ospf configured as network 0.0.0.0 0.0.0.0 area 0. So all interface can participate if they are
: W. m9 N/ ?- `# `up and if they have ip address.
; L, i" p3 r& T0 o, [: kBut because R5 interface connected to R4 could not obtail correct dhcp ip address from R4 due to DHCP1 R" o$ ^ X9 x# h" f) I( ]/ V
issue they wont form ospf neighborship.
. x5 k, | P ASo correct answer is DHCP issue between R5 & R4. |
213#
2018-9-28 12:07:06
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