Tuesday, August 9, 2022
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Configuring EIGRP Stub Characteristic – IP With Ease


EIGRP Stub

This function is generally used with the hub and spoke topologies. Routers on the spoke websites are configured as stubs making certain they the spoke websites don’t act as a transit path for the site visitors.

stub router will inform in EIGRP Howdy packets that it has stub function enabled and therefore no queries are despatched to stub router for any routes.

Associated – EIGRP Packet Varieties

This is one technique to sort out the well-known stuck-in-active points in EIGRP networks.

Allow us to use the topology under to configure it’s a function on Router 2.

eigrp stub connected

Within the topology above we’ve got shaped EIGRP neighborship between Router 1 & 2 as under:

R1#sh ip eigrp neighborsEIGRP-IPv4 Neighbors for AS(100)

H   Handle             Interface             Maintain  Uptime     SRTT   RTO   Q Cnt     Seq Num

(sec)                     (ms)

0   9.9.12.2               Fa0/0                 13        00:04:25  107      642      0            7

 

Now we have used the next configuration on R2:

ip route 2.2.2.2 255.255.255.255 9.9.23.3router eigrp 100

community 1.1.1.1 0.0.0.0

community 9.9.12.0 0.0.0.3

redistribute static metric 1000 1 255 1 1500

!

interface Loopback0

ip deal with 1.1.1.1 255.255.255.255

!

interface FastEthernet0/0

ip deal with 9.9.12.2 255.255.255.252

!

interface FastEthernet1/0

ip deal with 9.9.23.2 255.255.255.0

Now we’ll configure EIGRP Stub function on R2 with following choices and examine the EIGRP routes on R1 accordingly.

  1. Eigrp stub Related
  2. Eigrp stub static
  3. Eigrp stub receive-only
  4. Eigrp stub redistributed

 

1: CONFIGURING EIGRP STUB CONNECTED

R2(config-router)#eigrp stub related

Verification:

Solely related subnet 1.1.1.1 is marketed to R1.Although 9.9.23.0/24 can be related community however is just not marketed because it isn’t marketed beneath EIGRP course of.

R1#sh ip route eigrpGateway of final resort is just not set

1.0.0.0/32 is subnetted, 1 subnets

D       1.1.1.1 [90/156160] through 9.9.12.2, 00:00:06, FastEthernet0/0

 

2: CONFIGURING EIGRP STUB STATIC

R2(config-router)#eigrp stub static

Verification:

Solely the static path to 2.2.2.2 is seen as marketed to R1.

R1#sh ip route eigrp2.0.0.0/32 is subnetted, 1 subnets

D EX     2.2.2.2 [170/2562816] through 9.9.12.2, 00:00:07, FastEthernet0/0

 

3: EIGRP STUB RECEIVE-ONLY

R2(config-router)#eigrp stub receive-only

Verification:

No route is marketed to R1.

R1#sh ip route eigrpCodes: L – native, C – related, S – static, R – RIP, M – cell, B – BGP

D – EIGRP, EX – EIGRP exterior, O – OSPF, IA – OSPF inter space

N1 – OSPF NSSA exterior kind 1, N2 – OSPF NSSA exterior kind 2

E1 – OSPF exterior kind 1, E2 – OSPF exterior kind 2

i – IS-IS, su – IS-IS abstract, L1 – IS-IS level-1, L2 – IS-IS level-2

ia – IS-IS inter space, * – candidate default, U – per-user static route

o – ODR, P – periodic downloaded static route, H – NHRP, l – LISP

+ – replicated route, % – subsequent hop override

Gateway of final resort is just not set

 

4EIGRP STUB REDISTRIBUTED

R2(config-router)#eigrp stub redistributed

Verification:

Solely the redistribute static route is seen to be marketed.

R1#sh ip route eigrp2.0.0.0/32 is subnetted, 1 subnets

D EX     2.2.2.2 [170/2562816] through 9.9.12.2, 00:01:07, FastEthernet0/0

Proceed Studying:

EIGRP Interview questions

EIGRP vs OSPF : Know the distinction


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