Layer3 Switch and HSRP?

Discussion in 'Cisco' started by Jean-Michel Kaiser, Dec 24, 2004.

  1. Hello,

    This is a general question based on those layer-3 switch (ie, 3550)

    If we stack two of them putting the 2 first ports of the first switch in
    the same VLAN as the two first ports of the second switch. Stated that
    the VLAN is for about

    Is it possible to have being the HSRP address of the VLAN?

    The idea is to have the primary PIX 535 connected up on the first port
    of thje first switch and the backup PIX on the other port on the other
    switch but all being in the same VLAN. This is to provide the inside LAN
    with a catastrophic plan,

    To do it, do we need a special IOS on the switch?

    Thank you,

    Jean-Michel Kaiser, Dec 24, 2004
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  2. Jean-Michel Kaiser

    olavarrm Guest

    In short the answer is YES. You need to use the EMI (layer 3) software
    for the 3550. Here is a sample of what switch 1 and 2 configs could be.

    Vlan 10
    ip address
    standby ip
    standby priority 120 preempt delay 300

    FastEthernet 0/0
    Description: Primary Pix
    switchport mode access
    switchport access vlan 10

    Vlan 10
    ip address
    standby ip
    standby priority 110

    FastEthernet 0/0
    Description: Secondary Pix
    switchport mode access
    switchport access vlan 10

    You will need to set up a trunk between the two switches and allow vlan
    10 to pass over the trunk. I suggest that in such a small environment
    that you use VTP mode transparent and create the vlans on both
    switches. I also suggest that you set up an Etherchannel between the
    two switches so you can have additional redundancy.

    olavarrm, Dec 26, 2004
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  3. By "stacking" do you mean clustering (using the switch cluster global
    configuration commands) or just two switches next to each other with a
    trunk port?
    certainly. The EMI software supports HSRP.
    The pix and router both speak OSPF, and it works well in fail-over
    situations. You would be better off running a routing protocol like OSPF
    rather than HSRP.

    Daniel J McDonald, CCIE #2495, CNX
    Austin Network Design
    Daniel J McDonald, Dec 26, 2004
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