RE: [load balancing] BigIP's and trunking

From: Rick Masters (r.mastersIZZATf5.com)
Date: Wed Jan 16 2002 - 22:32:37 EST

  • Next message: John Hall: "Re: [load balancing] BigIP's and trunking"

    Tim,

    In my previous message, I was referring to 802.1q
    as the link aggregation (sometimes known as
    "trunking") standard when the standard is really
    802.1ad. Sorry about that.

    802.1Q actually defines how to carry multiple vlans on
    the same interface, which is also sometimes called
    "trunking". Hence the confusion.

    I assumed you were talking about the first meaning
    of the word "trunk" because you were looking for
    bandwith aggregation. However, since you were indicating
    this feature existed in 3.x, I'm wondering if you
    actually meant 802.1Q vlan trunking, which did exist
    in 3.x. That seems more likely because 802.1ad link aggregation
    was not available in 3.x.

    So, if you could clarify which feature you are interested in,
    we'd be happy to explain it. (By the way, the vlan trunking/
    tagging issue is in the manual on page 2-99).

    Regards,
    Rick Masters
    F5 Networks

    -----Original Message-----
    From: Tim Maestas [mailto:lbIZZATdnsconsultants.com]
    Sent: Wednesday, January 16, 2002 6:42 PM
    To: lb-lIZZATvegan.net
    Subject: [load balancing] BigIP's and trunking

    I was wondering if anyone has had any experiences (good, bad, or
    otherwise) with using trunking under BigIP 4.x, in particular into a Cisco
    6500 series switch. In reading the 4.x documentation, there is no mention
    of 802.1q trunk modes like there was in 3.x, so I'm not sure how I would
    be able to make my Cisco treat my trunked interfaces as a group. In 4.x
    it seems like outgoing packets from the BigIP would be
    "load-balanced" between the interfaces, but I don't see how this is
    possible for incoming packets, without something like 802.1q. Granted,
    if nothing else trunks will give me interface failover, but I'm looking
    more for bandwidth aggregation. Any info would be appreciated.

    -Tim

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