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New Member

eigrp summary-address and internal/external type

Hi!

We have two simple summarization config.

interface 0/0

ip summary-address 20 10.42.0.0 255.255.0.0 5

interface 0/1

ip summary-address 100 10.42.0.0 255.255.0.0 5

The summarization is working well.

Our problem is the following.

The eigrp advertises the summary route distance as internal(90) via 0/0 and external(170) via 0/1.

The show ip route shows

Lajos_CORE_A#sho ip route 10.42.0.0

Routing entry for 10.42.0.0/16

Known via "eigrp 20", distance 5, metric 3072, type internal

Redistributing via eigrp 100, eigrp 20

Advertised by eigrp 100

Routing Descriptor Blocks:

* directly connected, via Null0

Route metric is 3072, traffic share count is 1

Total delay is 20 microseconds, minimum bandwidth is 1000000 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 1/255, Hops 1

--------------------------------

How can i change or control which direction will be the internal or external or internal only via both directions.

The 2 AS is needed in this issue.

Thanks

10 REPLIES

Re: eigrp summary-address and internal/external type

You are redistributing on AS into another, You can change the redistributed metric from 170 to any number you want - but this is ONLY local to the router you change it on, it does not get advertised.

eigrp #

distance # <>

New Member

Re: eigrp summary-address and internal/external type

Hi!

Thanks. It is right.

But Why the AS 20 is the internal ?

Because this was configured first time? HoW can i control the advertisement distance ?

Thanks,

Re: eigrp summary-address and internal/external type

This is because you are redistributing 100 into 20 - when you look at a device configured in the AS 20 - 100 will be external as it is not in the same AS.

New Member

Re: eigrp summary-address and internal/external type

Hi!

I know the redistribution rules.

I do not use the redistributed command. The router distributes automatically from 20 - 100.

The question.

Why the AS 20 is default? How can i change the internal/external status (without route policy-map)?

Thanks

I would like to unterstand how the route select the default AS (internal) for aggregate routes if there are many AS. Is the first the default ?

Re: eigrp summary-address and internal/external type

ok - here is the thing, the last time I checked the only protocol that automatically redistributes dynamic routing protocols is IGRP into EIGRP and vice versa.

New Member

Re: eigrp summary-address and internal/external type

Hi!

I very thank your answers!

Unfortunetly we do not unterstand each other. May be my english is not properly.

My quetion once again.

Why the AS 20 is internal for aggregate route? I would like the change the summary-aggregate route eigrp type in the advertisements . The type will be internal In the AS 100 and external in the AS 20.

How can i do this ?

Thank once again!

Re: eigrp summary-address and internal/external type

Post your config (remove sensitive information) for the EIGRP/Interface config for review.

Hall of Fame Super Silver

Re: eigrp summary-address and internal/external type

Karoly says he is not using the redistribute command. I agree with Andrew that in my experience EIGRP does not redistribute automatically. The best way to resolve this is to be able to see the config.

It might also be helpful to see the output of show ip protocol.

HTH

Rick

New Member

Re: eigrp summary-address and internal/external type

hi!

I remove the one of 10.42.0.0 summary-route from AS 100 because i had to install now.

Actually the show ip protocols

Lajos_CORE_A#sho ip protocols

*** IP Routing is NSF aware ***

Routing Protocol is "eigrp 100 100"

Outgoing update filter list for all interfaces is not set

Incoming update filter list for all interfaces is not set

Default networks flagged in outgoing updates

Default networks accepted from incoming updates

EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

EIGRP maximum hopcount 100

EIGRP maximum metric variance 1

Default redistribution metric is 100000 10 255 255 150

Redistributing: eigrp 100 100, eigrp 20 20

EIGRP NSF-aware route hold timer is 240s

EIGRP NSF disabled

NSF signal timer is 20s

NSF converge timer is 120s

Automatic network summarization is not in effect

Address Summarization:

172.0.0.0/8 for GigabitEthernet3/1

Summarizing with metric 3072

10.0.0.0/8 for GigabitEthernet3/1

Summarizing with metric 3072

9.0.0.0/8 for GigabitEthernet3/1

Summarizing with metric 3072

Maximum path: 4

Routing for Networks:

192.168.153.0

Routing Information Sources:

Gateway Distance Last Update

(this router) 90 01:05:16

192.168.153.253 90 00:49:42

192.168.153.198 90 00:49:42

192.168.153.206 90 00:49:42

192.168.153.187 90 00:49:42

192.168.153.186 90 00:49:42

192.168.153.58 90 00:49:42

192.168.153.46 90 00:49:42

192.168.153.6 90 00:49:42

192.168.153.10 90 00:49:42

Distance: internal 90 external 170

Routing Protocol is "eigrp 20 20"

Outgoing update filter list for all interfaces is not set

Incoming update filter list for all interfaces is not set

Default networks flagged in outgoing updates

Default networks accepted from incoming updates

EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

EIGRP maximum hopcount 100

EIGRP maximum metric variance 1

Redistributing: eigrp 100 100, eigrp 20 20

EIGRP NSF-aware route hold timer is 240s

EIGRP NSF disabled

NSF signal timer is 20s

NSF converge timer is 120s

Automatic network summarization is not in effect

Address Summarization:

10.42.0.0/16 for GigabitEthernet3/2, GigabitEthernet3/3, GigabitEthernet3/4

Summarizing with metric 3072

Maximum path: 4

Routing for Networks:

192.168.150.0

Routing Information Sources:

Gateway Distance Last Update

(this router) 90 13w3d

192.168.150.166 90 00:49:45

192.168.150.162 90 00:49:45

192.168.150.158 90 00:49:45

Distance: internal 90 external 170

Hall of Fame Super Silver

Re: eigrp summary-address and internal/external type

Karoly

Thank you for the output of show ip protocol. It clearly shows that there is redistribution between eigrp 100 and eigrp 20. The next step is that we need to see the config (at a minimum the complete config of both eigrp processes).

HTH

Rick

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