Annex the info to switch - Cisco Community

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The problem that arises is that summarizes the network I portocolo EGRP, are implementing EIGRP dynamic routing on a switch 6880, when validated in neighboring router networks are with mask / 24 and no / 21

Someone happened this

13 Replies 13

Can you post the EIGRP configuration from your switch ?

Jon

Hi Jon,

Te annex the configuration

router eigrp 200
network 10.116.136.0 0.0.7.255
network 10.124.136.0 0.0.7.255
network 10.124.136.128 0.0.0.31
redistribute connected
passive-interface default
no passive-interface Vlan999
no passive-interface Vlan30

interface Vlan999
description XXXXX
ip address 10.124.136.133 255.255.255.224

interface TenGigabitEthernet5/13
description Router WAN
switchport
switchport access vlan 999
switchport mode access

the connection is established between the switch 6880 and router 3945

It's not clear which routes are showing as /24s on the router ?

Can you pick one of the routes and -

1) can you post the interface configuration from the switch for that IP subnet

and

2) the route as it appears on the router

note that it is the actual mask used on the interface IP subnet that is important, not what you put under the EIGRP configuration.

Jon

Annex the info to switch

VLAN

interface Vlan220

description VOZ_XXXXX

ip address 10.116.140.11 255.255.255.0

glbp 220 ip 10.116.140.10

glbp 220 timers 1 3

glbp 220 preempt delay minimum 3

glbp 220 load-balancing host-dependent

glbp 220 authentication text Pr0yadmon

glbp 220 forwarder preempt delay minimum 3

VLAN adyacencia EIGRP

interface Vlan999

description VPNACOL1

ip address 10.124.136.133 255.255.255.224

delay 1000

Interface EIGRP

interface TenGigabitEthernet5/13

description Router WAN

switchport

switchport access vlan 999

switchport mode access

Annex the info to Router ************************************

Interface EIGRP

interface GigabitEthernet0/0
description Lan_
ip address 10.124.136.131 255.255.255.224
duplex auto
speed auto

router eigrp 200
network 10.96.6.96 0.0.0.3
network 10.124.136.128 0.0.0.31
network 10.124.144.0 0.0.7.255
redistribute ospf 16205 metric 100000 100 255 1 1500

***********************************************************************************

the router learns networks /24 and not /21

Do you mean the router has a route for -

10.116.140.0 255.255.255.0

instead of -

10.116.136.0 255.255.248.0

if so that is what you would expect.

On your switch under the EIGRP configuration the "network 10.116.136 0.0.7.255" statement only tells the switch which interfaces to run EIGRP on.

So EIGRP is run on vlan 220 because the IP subnet is in the above range.

But the actual subnet mask advertised to the router is the one on the interface of vlan 220.

That is the way IGPs work unlike BGP where the "network ..." statement is the actual network advertised.

If you want to summarise to the router then under the interface on the switch that connects to the router you can use a summary address eg. -

int vlan 999
ip summary-address eigrp 200 <summary address> <mask>

Jon

Hi Jon,

Since the ip summary-address on the vlan interface was applied and did not work,

Armando

On the switch can you do "sh ip eigrp neighbors" and post output.

What command did you use under the interface ?

What exactly didn't work ie. an example.

Jon

Hi Jon,

I was set up on the vlan interface and does not work

int vlan 99
ip summary-address eigrp 200 10.116.136.0 255.255.248.0

So even after adding that command are you still seeing /24s in the IP routing table on the router that are within that IP subnet range ?

Jon

Yes, continues to be the network / 24s.

Armando

It's hard for me to help because I can't see the routing tables and you are giving minimal information in your answers.

Do you see the summarised route in the router's routing table ?

Does the switch peer with any other device using EIGRP ?

Jon

It's hard for me to help because I can't see the routing tables and you are giving minimal information in your answers.

Do you see the summarised route in the router's routing table ?

No, in the router`s table i dont see the summarised routes.

Does the switch peer with any other device using EIGRP ?

Yes, the diagram is:

Router ==> Swtich 6880 =(portchannnel) Switch 6880

The switches are the core, and both use EIGRP,

This is the configuration of Router:

interface GigabitEthernet0/0

description Lan

ip address 10.124.136.131 255.255.255.224

duplex auto

speed auto

!

This is the configuration of router

router eigrp 200

network 10.96.6.96 0.0.0.3

network 10.124.136.128 0.0.0.31

network 10.124.144.0 0.0.7.255

redistribute ospf 16205 metric 100000 100 255 1 1500

offset-list 99 out 500 GigabitEthernet0/0

!

router ospf 16205

redistribute eigrp 200 subnets

network 10.96.6.96 0.0.0.3 area 0

network 10.162.127.48 0.0.0.7 area 0

This is the configuration of Core 1:

interface Port-channel10

switchport

switchport trunk allowed vlan 10,20,30,31,103,109-115,120,203,209-215,220,999

switchport mode trunk

!

interface TenGigabitEthernet5/13

description Router WAN

switchport

switchport access vlan 999

switchport mode access

!

interface Vlan999

description VPNACOL1

ip address 10.124.136.133 255.255.255.224

delay 1000

!

!

router eigrp 200

network 10.116.136.0 0.0.7.255

network 10.120.66.160 0.0.0.15

network 10.124.136.0 0.0.7.255

network 10.124.136.128 0.0.0.31

redistribute connected

offset-list 99 out 500 Vlan999

passive-interface default

no passive-interface Vlan999

no passive-interface Vlan30

!

!

This is the configuration of Core 2:

!

interface Port-channel10

description Trunk SW 1

switchport

switchport trunk allowed vlan 10,20,30,31,103,109-115,120,203,209-215,220,999

switchport mode trunk

!

interface Vlan999

description RTRVOZAVCOL

ip address 10.124.136.132 255.255.255.224

!

!

router eigrp 200

network 10.116.136.0 0.0.7.255

network 10.124.136.0 0.0.7.255

network 10.124.136.128 0.0.0.31

redistribute connected

passive-interface default

no passive-interface Vlan31

no passive-interface Vlan999

!

Can you add the 10.116.136.0 255.255.248.0 summary address to both vlan 999 interfaces ie. on both switches.

Jon

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