EIGRP Router

What does  the following command mean
#1  redistribute connected
#2  eigrp stub connected summary
#3  In EIGRP, only "network 10.50.10.5 0.0.0.0" is included but I find that VLAN 3 can route to VLAN 6. How does it work ?


interface Vlan1
 ip address 192.168.100.252 255.255.255.0

!
interface Vlan3
 ip address 10.50.10.5 255.255.254.0
 ip helper-address 192.168.100.240
!
interface Vlan4
 ip address 10.50.21.1 255.255.255.0
!
interface Vlan5
 ip address 10.50.20.1 255.255.255.0
!
interface Vlan6
 ip address 10.50.30.1 255.255.255.0
 ip helper-address 10.50.10.21
!
!
router eigrp 2
 redistribute connected
 eigrp stub connected summary
 network 10.50.10.5 0.0.0.0
!
AXISHKAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

NetExpert Network Solutions Pte LtdTechnical SpecialistCommented:
#1  redistribute connected   -- redistributing the connected networks(with subnet masks) assigned to interface into the EIGRP routing table

Usually the router will have connected, static and dynamic routes in the routing table.  if you want the connected networks/static needs to participate in the dynamic routing table, we need to redistribute it.

#2  eigrp stub connected summary  -->
"eigrp stub connected" stops advertising summary routes, and "eigrp stub summary" will stop
advertise connected.

#3  In EIGRP, only "network 10.50.10.5 0.0.0.0" is included but I find that VLAN 3 can route to VLAN 6. How does it work ?    -- VLAN3 and VLAN6 are in the same router; Hence both VLAN networks will be in connected routing table and each other can ping without EIGRP
1

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
JustInCaseCommented:
#2  eigrp stub connected summary  -->
"eigrp stub connected" stops advertising summary routes, and "eigrp stub summary" will stop advertise connected.
Just the opposite. Router is marked as stub router (one of the ways to prevent stuck in active (SIA)), and router will advertise just connected and summary routes.

router eigrp 2
network 10.50.10.5 0.0.0.0
will perform two things - it will advertise 10.0.0.0/8 network in eigrp AS 2 (since there is no command no auto-summary - auto summary is default option), and it will advertise it just on interface with IP address 10.50.10.5 (subnet mask 0.0.0.0 means - exactly this address)

VLAN3 and VLAN6 are in the same router; Hence both VLAN networks will be in connected routing table and each other can ping without EIGRP
This is true if ip routing is enabled (ip routing is default for Cisco routers for IPv4)
1
AXISHKAuthor Commented:
Thanks

#1 What's the point of using EIGRP if these VLANs can be routed within themselves ?

#2 Is the switch is connected to another switch through trunk port, do I need to add EIGRP routing ?
 
#3 redistribute connected... does it also include static and virtual interface, or just the physical connected interface

#4 Router is marked as stub router and router will advertise just connected and summary routes. Does you mean the my multi-layer switches ?

Tks
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

NetExpert Network Solutions Pte LtdTechnical SpecialistCommented:
Connected routes can communicate within the device only. If you have two sites and if you want both sites to communicate each other , then u need EIGRP(or other dynamic routing protocol)

#2 --- no need to enable EIGRP on the access switches

#3 --- redistribute connected will not advertise static routes. For redistributing the static routes you need to use "redistribute static " command

#4 --- yes
0
AXISHKAuthor Commented:
#3 redistribute only advertise physical interface, how about virtual interface ? Tks
0
JustInCaseCommented:
With EIGRP network command you can always advertise any attached interface (AD 90), but redistribute connected will also advertise virtual interfaces (loopback, tunnel, subinterfaces - since those are connected interfaces) as external networks with AD 170.

And actually command # redistribute connected as it is configured in your post will not advertise any connected interface (it will, but it will advertise connected interfaces with infinite metric, so those routes will not be accepted by any neighbor router).
For redistribution into EIGRP you must set seed metric, if seed metric is not set redistributed routes are advertised with infinite metric.
1
AXISHKAuthor Commented:
tks
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Routers

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.