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Forum Replies

  1. Thanks Rene,

    I have another question, in the above section where u have mention about ARP request construct, I think the behavior of switches are different

    The multilayer switch will check the routing table, notices that 192.168.20 /24 is directly connected and the following will happen:
    The destination MAC address changes from FFF (Multilayer switch Fa0/1 ) to BBB (ComputerB).
    The source MAC address changes from AAA (ComputerA) to GGG (Multilayer switch Fa0/2).===This seems to be Incorrect

    I LAB this up with 3 switches (all real hardware 3550/3560) [ c3560-ips

    ... Continue reading in our forum

  2. Hi Andrew!,

    Glad to see you around and yea! thanks for confirming my doubt.

    I have a few more doubts that i have no where to turn to and i hope you will enlightened me…

    My coreswitch has ip cef turn on my default.

    q1) I have been reading up abit on cisco about IP CEF and it seems like to enable/disable IP CEF, you have to do in at the ingress interface as the decision (e.g. load balance is done there). – is it right ?

    Assuming i have “no ip cef” and only wish to turn on ip cef on certain interfaces and ->
    q2) if i want to do to packet loadbalancing, should “ip

    ... Continue reading in our forum

    1. The ARP table is stored in RAM, and not in either CAM or TCAM

    2. Here is the Cisco definition of Epoch and how it is used:

    The term "epoch" refers to a period of time. A new epoch for a Cisco Express Forwarding table begins when a table rebuild is initiated. The time after this instant is in an epoch different from the time before, and the different epochs are numbered between 0 and 255. Through the use of epochs, the software can distinguish between old and new forwarding information in the same database structure and can retain the old Cisco Express Forwar
    ... Continue reading in our forum

  3. Hello Chandrakant.

    I believe you are correct. Actually, those two commands should be on for each of the R1 and R2 routers like so:

    R2(config)#ip route

    R1(config)#ip route

    I will let Rene know so it can be corrected.

    Thanks very much!


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