How to make ISP B active using EIGRP & HSRP on the below scenario

mirzaakberali · ‎02-04-2009

Hi,

Please help me to configure ISP B using Eigrp ( metirc) and HSRP as the primary Link , such that traffic should only pass through it.

Current scenario

L2 Core switch --vlan 905-----ISP A

L2 Core Switch --vlan 906---------ISP B

Now L2 Core switch connected to HSRP Two Routers ( DDC Router A& Router B ).

HSRP is configured between Router A & B.

Currently Router A is given higher priority of 110.

Also let me know in this current scenario Eigrp is performing Load balancing ? if not please let me know the config.

+++++++++++++++++++++++++++++++++++++++++

L2 Core switchDDC1#interface GigabitEthernet5/7

description ISPA MAN link DDC1-DDC3

switchport access vlan 905

switchport mode access

speed 100

duplex full

no cdp enable

!

interface GigabitEthernet5/8

description ISPB Link DDC1-DDC3

switchport access vlan 906

switchport mode access

speed 100

duplex full

no cdp enable

++++++++++++++++++++++++++++++++++++

Router A#HSRP Priamry IP - 10.189.40.44 ( Standby ip - 10.189.40.40)-----

interface GigabitEthernet0/1.905

description "Primary Link-DDC1-DDC3_ISP A

encapsulation dot1Q 905

ip address 10.189.223.209 255.255.255.252

no ip redirects

no ip unreachables

no ip proxy-arp

ip nbar protocol-discovery

ip virtual-reassembly

no snmp trap link-status

no cdp enable

router eigrp 140

redistribute connected

redistribute static

network 10.189.40.44 0.0.0.1

network 10.189.223.192 0.0.0.3

network 10.189.223.200 0.0.0.3

network 10.189.223.208 0.0.0.3

no auto-summary

++++++++++++++++++++++++++++++++++++

RouterB# HSRP secondary IP -10.189.40.45

interface GigabitEthernet0/1.906

description "Secondary Link-DDC1-DDC3_ISP B

bandwidth 100000

encapsulation dot1Q 906

ip address 10.189.223.213 255.255.255.252

no ip redirects

no ip unreachables

no ip proxy-arp

ip nbar protocol-discovery

ip virtual-reassembly

no snmp trap link-status

no cdp enable

router eigrp 140

redistribute connected

redistribute static

network 10.189.40.44 0.0.0.1

network 10.189.223.192 0.0.0.31

no auto-summary

Giuseppe Larosa · ‎02-04-2009

Hello Mirza,

for HSRP you should use tracking but with object tracking to track ISPA next hop ip address or ip routing on interface g0/1.906

for EIGRP you can make R2 the less preferred path by increasing delay on the client vlan on R2.

In this way R2 EIGRP update will be worse then R1 update about the same subnets (this implies both providers can carry EIGRP routes to remote/central site)

Hope to help

Giuseppe

mirzaakberali · ‎02-04-2009

Thanks for your comments!

I could not get your above Post!

L2 Core switch both the routers are connected to the same switch .

L2Core switch1 ---> Router A with Vlan 905

L2Core switch 1---> RouterB with Vlan 906.

Can we do perform some thing on Eigrp ( metric/cost part) by keeping Vlan config same.

Bcoz at persent i have some intermittent issue with ISP A and hence want all traiffc on ISPB.

Giuseppe Larosa · ‎02-04-2009

Hello Mirza,

I mean on the one you want less preferred

R1 - ISPA

let's suppose vlan 200 is your client vlan

int gi0/0.200

delay 10000

Hope to help

Giuseppe

mirzaakberali · ‎02-04-2009

Hello Giuslar,

I want for some period both Vlan 905 & 906 at L2 shld pass on ISP B to reach their same destination.

Vlan 905 & 906 are reaching to pa particular destination.

Can you expalin me in detail!

For you above comments - what shld be the delay i have to setup for ISP B ....

shld Delay on ISP B be more or less to get Priority.

Giuseppe Larosa · ‎02-04-2009

Hello Mirza,

EIGRP metric is cumulative on delay so you need to increase delay on the interfaces you want to make less preferred

you can do this on the client Vlans and/or the core facing links

in this way you should make the routes via R2 and via ISPB preferred

it can help to increase delay also on the interface from ISP1 on remote site

Hope to help

Giuseppe

mirzaakberali · ‎02-04-2009

Hi Guislar,

Now i am able to catch your point on the delay part of Eigrp.

So you mean my both vlans will not at all go to ISP A path to reach destination?

Also can we achieve my task using Eigrp Metrics?

Can we achive this by any chance with HSRP.

Based on my first Post config, is it a Loadbalancing configured at l2 by having two seperate vlans for both ISP ...from switch level

Here i get a question like how does HSRP works between two routers when both the routers are allowed only by a single Vlan at a time.

Router A - vlan 905

Router B - vlan 906.

Please clariefy me.

Many thanks for the posts.