[CentOS] Need help with an odd issue I am experiencing

David Petruzzella sektor at dsli.com
Tue Sep 9 15:22:48 UTC 2008


Not a laptop it is a server with dual nics mtu set at 1500, 1 nic directly to the cable modem the other to my lan.
---------- Original Message ----------------------------------
From: "Joseph L. Casale" <JCasale at activenetwerx.com>
Reply-To: CentOS mailing list <centos at centos.org>
Date:  Mon, 8 Sep 2008 23:46:40 -0600

>>I have a server with dual nic's running centos 5.2 1 nic connects to the
>>cable modem, which has 15m d and 2m up, but speed tests barely come back at
>>5mb down including road runner's internal speed test. I hook up my laptop to
>>the same modem, same port, using the same cable and I get 17mb down. I have
>>ruled out iptables, nics (because same result on both nics), cables, cable
>>modem(with a brighthouse rep) any suggestions would be greatly appreciated.
>>Thanks.
>
>So I gather the nics aren't teamed from your wording, maybe MTU is set sub
>optimal for your particular ISP? What OS on your laptop? Wrong MTU can have
>a significant effect such as this.
>
>jlc
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