Cisco Catalyst 6880-X Specifications download pdf (Page 102)

Core Layer April 2014

EIGRP Unicast Routing

Enable EIGRP for the IP address space that the network will be using. If needed for your network, you can enter

multiple network statements. The Loopback 0 IP address is used for the EIGRP router ID to ensure maximum

resiliency. You enable router authentication for all neighbors of the core. This allows all layer-3 devices attached

to the core to form routing neighbor relationships.

key chain CAMPUS-KEY

key 1

key-string [key]

router eigrp CAMPUS

address-family ipv4 unicast autonomous-system 100

network 10.4.0.0 0.1.255.255

eigrp router-id [ip address of loopback 0]

nsf

af-interface default

authentication mode md5

authentication key-chain CAMPUS-KEY

exit-af-interface

exit-address-family

OSPF Unicast Routing

Enable OSPF for the IP address space that the network will be using. If needed for your network, you can enter

multiple network statements. The Loopback 0 IP address is used for the OSPF router ID to ensure maximum

resiliency. Unlike EIGRP named mode configuration, OSPF neighbor authentication also requires a configuration

attached directly to the layer-3 interfaces, so additional router neighbor authentication configuration is done as

part of a later step.

router ospf 100

router-id [ip address of loopback 0]

nsf

area 0 authentication message-digest

network 10.4.40.0 0.0.0.255 area 0

Procedure 4 Configure IP Multicast routing

IP Multicast allows a single IP data stream to be sent from a single source to multiple receivers and be replicated

by the infrastructure (that is, routers and switches). Using IP Multicast is much more efficient than multiple unicast

streams or a broadcast stream that would propagate everywhere. IP Telephony Music on Hold and IP Video

Broadcast Streaming are two examples of IP Multicast applications.

To receive a particular IP Multicast data stream, end hosts must join a multicast group by sending an Internet

Group Management Protocol (IGMP) message to their local multicast router. In a traditional IP Multicast design,

the local router consults another router in the network that is acting as an RP to map receivers to active sources

so they can join their streams.

The RP is a control-plane operation that should be placed in the core of the network or close to the IP Multicast

sources on a pair of Layer 3 switches or routers. This design, which is based on the pim sparse mode multicast

operation, uses the resiliency inherent in a VSS configuration for a simple yet scalable way to provide a highly

resilient RP environment.

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Cisco Catalyst 6880-X Specifications Page 102

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