I would stay away from directed broadcasts for IP helper commands. Remember
that ip helper not only forwards DHCP, but Netbios and NTP stuff too. You
can turn the unneeded broadcast off with the "no ip forward protocol"
commands.
Try and just use unicasts on you helper commands and watch utilization. I
know that there are a lot of bugs related to this command on MSFC's. A
different version might be needed.
Tony M.
#6172
----- Original Message -----
From: Larry Ogun-Banjo
To:
Sent: Sunday, June 24, 2001 10:15 PM
Subject: MSFC IP helper-addressing [7:9736]
> All
> Has anyone encountered extremely high CPU processing (over 90%) when IP
> helper
> addressing has been configured over MSFCs (not dedicated routers)? On my
> network, this command produced very bad performance problems. However, I
must
> stress that the command was used for broadcasting (xxx.xxx.xxx.255) and
also
> specified for single hosts.
> Cisco documentation says this is possible on routers and although
specified
> protocols are forwarded, the performance was extremely poor on MSFC. IOS
is
> 12.1(7a)
> If you have had this problem, how did you rectify it (apart from removing
the
> command)?
>
> Many thanx
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=9780&t=9736
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