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Forum Replies

  1. Hi William,

    Under topology base you will find commands that have to do with the EIGRP topology table. Stuff like redistribution, filtering, etc. Here’s an overview of all commands:

    R1(config-router)#router eigrp TEST                               
    R1(config-router)#address-family ipv4 unicast autonomous-system 1 
    R1(config-router-af)#topology base                                  
    Address Family Topology configuration commands:
      auto-summary         Enable automatic network number summarization
      cts                  EIGRP Trust
    ... Continue reading in our forum

  2. Hi Minh,

    Address-families are used for different protocols. For example, in EIGRP there is an address-family for IPv4 and another address-family for IPv6.

    For BGP, there are address families for unicast, multicast, VPN routes and each of those for both IPv4 and IPv6.

    The service family for EIGRP is used for SAF (Service Advertisement Framework). SAF is some framework that is used for Voice over IP. Instead of IPv4/IPv6, you can exchange SAF stuff with EIGRP .


  3. Hi Lagapides ,

    Thanks …Well understand this explanation…

  4. Hello Network

    EIGRP named mode supports what is known as the Wide Metrics feature. This feature supports 64-bit metric calculations as opposed to EIGRP classic mode that use 32-bit calculations. This results in varying metric values between the two.

    Wide metrics was introduced in order to accommodate high-bandwidth interfaces and Ethernet channels. The increase in available speeds has resulted in incorrect or inconsistent routing behavior with the classic EIGRP routing metrics. The lowest delay that can be configured for an interface is 10 microseconds. As a

    ... Continue reading in our forum

  5. Hi Rene and staff

    i just look at EIGRP named to configure a lab in another lesson
    So i explore the commands of the configuration modes; in the labs i did, i only used the topology mode base


    I tried to test (just for fun) the command with EIGRP that i suppose to set Multi-Topology Routing


    As you see, IOS answer “VIDEO does not exist”
    Could you give me

    ... Continue reading in our forum

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