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AXISHK
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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
!
RoutersSwitches / Hubs

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AXISHK

8/22/2022 - Mon
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NetExpert Network Solutions Pte Ltd

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Predrag Jovic

#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)
AXISHK

ASKER
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
NetExpert Network Solutions Pte Ltd

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
Your help has saved me hundreds of hours of internet surfing.
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AXISHK

ASKER
#3 redistribute only advertise physical interface, how about virtual interface ? Tks
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Predrag Jovic

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AXISHK

ASKER
tks