Candidate Default Question

Hi All,

        R5
          |
R1 - R2 - R3

R1:
conf t
int lo11
 ip add
11.11.11.11 255.0.0.0
router eigrp 10
 network 0.0.0.0
 no auto
(ip
defautl-network 11.0.0.0)//Not apply this command

R5:
conf t
int lo11
 ip add
11.11.11.11 255.0.0.0
router eigrp 10
 network 0.0.0.0
 no auto
ip
default-network 11.0.0.0

R2:
router eigrp 10
 network 0.0.0.0
show ip route
D* 11.0.0.0/8 [90/156160] via 10.1.25.5, 00:00:17, FastEthernet0/0
         
               [90/156160] via 10.1.12.1, 00:00:17, FastEthernet1/0

(The *
apply to both R1 and R5, even though R1 not apply "ip default-network
11.0.0.0)

show ip route
Routing entry for 11.0.0.0/8
  Known via "eigrp 10",
distance 90, metric 156160, candidate default path, type internal
 
Redistributing via eigrp 10
  Last update from 10.1.25.5 on FastEthernet0/0,
00:00:42 ago
  Routing Descriptor Blocks:
  * 10.1.25.5, from 10.1.25.5,
00:00:42 ago, via FastEthernet0/0
      Route metric is 156160, traffic share
count is 1
      Total delay is 5100 microseconds, minimum bandwidth is 100000
Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255,
Hops 1
    10.1.12.1, from 10.1.12.1, 00:00:42 ago, via FastEthernet1/0
     
Route metric is 156160, traffic share count is 1
      Total delay is 5100
microseconds, minimum bandwidth is 100000 Kbit
      Reliability 255/255,
minimum MTU 1500 bytes
      Loading 1/255, Hops 1

(it will choose the lowest
ip address as i observe, must use "clear ip eigrp nei").

R3:
router eigrp 10
 network 0.0.0.0
 no auto

** The question is when is when traceroute
11.11.11.11 from R3, it always use 10.1.12.1 ??
But when I traceroute
11.11.11.11 from R2, it's always alternate as shown below. I know it's load
balance,
but why R2 not suppose to use the default candidate 10.1.25.5 ??? ***
R3#traceroute 11.11.11.11

Type escape sequence to abort.
Tracing the route to
11.11.11.11

  1 10.1.23.2 36 msec 48 msec 16 msec
  2 10.1.12.1 64 msec * 80
msec

---------------------------------------
R2#traceroute 11.11.11.11

Type
escape sequence to abort.
Tracing the route to 11.11.11.11

  1 10.1.25.5 36
msec
    10.1.12.1 36 msec *
R2#traceroute 11.11.11.11

Type escape sequence
to abort.
Tracing the route to 11.11.11.11

  1 10.1.12.1 44 msec
   
10.1.25.5 48 msec *

Thks in advance.

Rgds,
Derek

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Received on Tue May 22 2012 - 22:31:22 ART