RE: [load balancing] RE:

From: Chuck Adkins (Chuck.AdkinsIZZATtheice.com)
Date: Wed May 21 2003 - 15:11:51 EDT

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    Such a show off - and then you don't even explain how to enable ICMP.
    Light-weight novice all the way around - total rookie mistake Matt.
    Nice work.

    Chuck

    From ask.f5.com:

    Solution ID: SOL306
    Why am I unable to ping from nodes behind the BIG-IP Controller to an
    external network, even with a NAT configured?
    Description:
    Product: BIG-IP
    Version: 1.8.3 through 4.5
    Updated: 03/25/2003

    I cannot ping from nodes behind the BIG-IP Controller to an external
    network even though I have a NAT configured.

    Resolution:
    BIG-IP version 1.8.3 through 4.5 will not pass ICMP messages (ping) if
    the ICMP messages pass through a virtual server, even if a NAT is
    configured. The only way to successfully pass an ICMP message in BIG-IP
    version 1.8.3 through 4.5 is to enable IP forwarding.

    Important: F5 Networks recommends that you do not use IP forwarding in
    conjunction with NATs or SNATs. If load balancing is not required
    (thereby eliminating the need for a virtual server), the BIG-IP could
    pass ICMP messages using only a NAT.

    BIG-IP 4.1 through 4.5
    To allow IP forwarding on BIG-IP version 4.1 through 4.5, enable any_ip
    on the virtual server through which the ICMP traffic passes. For
    specific instructions, refer to the BIG-IP manual.

    BIG-IP version 1.8.3 through 4.0
    To allow IP forwarding on BIG-IP version 4.1 through 4.3, enable any_ip
    on the virtual server through which the ICMP traffic passes. For
    specific instructions, refer to the BIG-IP manual.

    -----Original Message-----
    From: Cauthorn, Matt (MAN-Corporate) [mailto:Matt.CauthornIZZATcox.com]
    Sent: Wednesday, May 21, 2003 12:31 PM
    To: 'lb-lIZZATvegan.net'
    Subject: [load balancing] RE:

    By default BigIP will not pass ICMP packets through to the
    external...try to telnet to port 80 (or whatever port your webserver is
    using) instead. Also make sure you have the external vlan enabled for
    your pool.

    Matt

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