Routing Notes 06 EIGRP MPLS Design

EIGRP OVER MPLS

MPLS
1. service provider technology
2. creates labels (MPLS) for customers
    - improves routing speed
    - customer categorization/tagged of routing information
3. any physical media before going to service provider network (cable, dsl, eth etc)
4. L2 - layer 2 medium acts as a switch (not scalable)
5. L3 - layer 3 works as peering/neighbor with the customer
6. L2 - design perspective is too chaotic, work around are VLANs
7. L3 - BGP routing is used internally by the service provider, integrates with the tag
8. L3 - runs BGP natively with the customer
9. L3 - provides QOS

EIGRP OVER FRAME RELAY

Frame Relays
1. Dedicated circuits
2. DLCIs (Data Link Connection Identifier) , PVCs (Permanent Virtual Cirtuits)
3. Provisiongs bursting
4. Frame Relay Maps

PVC Designs
1. Hub and Spoke - one single point of failure
2. Full Mesh - interconnected PVCs
3. Partial Mesh - some sites are not interconnected

Multipoint Interface design for EIGRP
- Split Horizon occurs (interface cannot recieve an update, distance vector type)
- Hub and spoke behavior
- Manual mapping

Point to Point design for EIGRP
- Create a sub-interface
- Dedicated interface
- One manual neighbor statement removes multicast

EIGRP handles Non Broadcast Multi-Access (NBMA)

EIGRP Configuring Point to Point Configuration MPLS
- Creates a sub-interface per connection acting as its own subnet

ROUTER MAIN
conf t
int s0/0
encapsulation frame-relay
int s0/0.102 point-to-point
ip address x.x.102.1 255.255.255.252
frame-relay interface-dlci 102
int s0/0.103 point-to-point
ip address x.x.103.1 255.255.255.252
frame-relay interface-dlci 103

show ip interface brief
(interface would be done due, requires configuration on other router)

ROUTER-E 2
cont f
int s0/0
encapsulation frame-relay
int s0/0.201 point-to-point
ip address x.x.102.1 255.255.255.252
frame-relay interface-dlci 201
show ip interface brief

ROUTER-W 3
cont f
int s0/0
encapsulation frame-relay
int s0/0.301 point-to-point
ip address x.x.103.1 255.255.255.252
frame-relay interface-dlci 301
show ip interface brief

ROUTER MAIN, 2 and 3
router eigrp 55
no auto
network x.x.x.x

Next is to do summarization

ROUTER-W 3
conf t
int s0/0.301
ip summary-address eigrp 55 x.x.x.x y.y.y.y

ROUTER-W 2
conf t
int s0/0.201
ip summary-address eigrp 55 x.x.x.x y.y.y.y

ROUTER MAIN
show ip route

EIGRP Configuring Multipoint Configuration MPLS

ROUTER MAIN
conf t
int s0/0.100 multipoint
ip address 100.10.50.10 255.255.255.0
frame-relay map ip 100.10.50.20 102 (local DLCI) broadcast (disable non broadcast multi access/pretend broadcast is allowed)
frame-relay map ip 100.10.50.30 103 broadcast

ROUTER-W 2
conf t
int s0/0.201 multipoint
ip address 100.10.50.20 255.255.255.0
frame-relay map ip 100.10.50.10 201 broadcast
frame-relay map ip 100.10.50.30 201 broadcast (from RMAIN it will travel to RE3)

ROUTER-E 3
conf t
int s0/0.301 multipoint
ip address 100.10.50.30 255.255.255.0
frame-relay map ip 100.10.50.10. 301 broadcast
frame-relay map ip 100.10.50.20 301 broadcast (from RMAIN it will travel to RW2)

ROUTER MAIN, 2 and 3
router eigrp 100
no auto
network x.x.x.x

ROUTER MAIN
conf t
int s0/0.100
no ip split-horizon eigrp 100 (disbaling split horizon)

ROUTER MAIN, 2 and 3
show ip route