AD of summary routes in eigrp

[zawawamo]

Hi all,

I noticed that I am not getting the correct AD (which is 5) when a summary route is being learned from a router to another router, both are in the same EIGRP process ID the AD as shown in the config is 90 just like I am advertising normal router!

Is there any explanation, btw I am using eve-ng image, is this a common problem for the image.

Thanks in advance.

[MHM Cisco World]

can we see the config ?

[zawawamo]

yes sure the first router int. Ethernet 0/0 connected to the second router int. Ethernet 0/1

for the first router this is the running config :

interface Ethernet0/0
ip address 11.11.11.2 255.255.255.252
ip summary-address eigrp 10 10.1.0.0 255.255.0.0 (this is the summary command i placed on the interface conncetd to the other router)
interface Loopback1
ip address 10.1.1.1 255.255.255.0

interface Loopback2
ip address 10.1.2.1 255.255.255.0

interface Loopback3
ip address 10.1.3.1 255.255.255.0

interface Loopback4
ip address 10.1.4.1 255.255.255.0

router eigrp 10
network 10.1.0.0 0.0.255.255
network 11.11.11.0 0.0.0.3

and the routing table is:

10.1.0.0/16 is a summary, 00:07:36, Null0
C 10.1.1.0/24 is directly connected, Loopback1
L 10.1.1.1/32 is directly connected, Loopback1
C 10.1.2.0/24 is directly connected, Loopback2
L 10.1.2.1/32 is directly connected, Loopback2
C 10.1.3.0/24 is directly connected, Loopback3
L 10.1.3.1/32 is directly connected, Loopback3
C 10.1.4.0/24 is directly connected, Loopback4
L 10.1.4.1/32 is directly connected, Loopback4
11.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 11.11.11.0/30 is directly connected, Ethernet0/0
L 11.11.11.2/32 is directly connected, Ethernet0/0

for the second router the running config is:

interface Ethernet0/1
ip address 11.11.11.1 255.255.255.252

router eigrp 10
network 11.11.11.0 0.0.0.3

and the routing table is :

10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
D 10.1.0.0/16 [90/409600] via 11.11.11.2, 00:02:39, Ethernet0/1 (this is where I think that the AD shoul be 5 not 90)
D 10.12.0.0/16 [90/281632] via 12.12.12.2, 00:02:42, Ethernet0/2
D 10.13.0.0/16 [90/409600] via 13.13.13.2, 00:02:42, Ethernet0/3
O 10.14.0.1/32 [110/11] via 14.14.14.2, 00:01:59, Ethernet1/0

[Martin L]

AD significance is local only ! check AD on the router that generated summary; it should be 5 but not on others that get it that same summary.  Simply said, AD does not travel with routes; it would be a mess if it did. So, AD can be locally set by you or set by protocol by default.

Regards, ML
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[zawawamo]

sure I agree totally, maybe some misconfiguration done you can check the config in the reply 

[Martin L · Accepted solution]

no misconfigurations at all; AD is not advertised with routes; AD of 5 is set on R1 but when neighbors R2 and R3 get route X via EIGRP and route Y via BGP, they assign its local AD based on local settings. 

you can change AD locally on R2 and R3 with distance command; change R2 AD for EIGRP to 95 and 177 and on R3 change it to 77 and 125 to see what happens.

you can see those "default AD" settings with show run full or show run all commands and look in section "router eigrp ". 

Regards, ML
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[zawawamo]

crystal clear, now I understand thank you.