Redução de velocidade

tiagoshimizu
(usa Debian)

Enviado em 12/03/2017 - 16:37h

Olá a todos.

Estou montando um servidor para testes em que utilizo o debian 8 e possuo duas placas de rede, eth0 ligada direta ao modem e a eth1 para a intranet, ligada a um roteador wifi. Configurei o isc-dhcp-server para atribuir os endereços ip's na placa eth1 e tudo está funcionando ok. No firewall, utilizo as seguintes regras:

iptables -F

iptables -t nat -F

iptables -P INPUT ACCEPT

iptables -P OUTPUT ACCEPT

iptables -P FORWARD ACCEPT

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

 

Meu ethtool eth0

Settings for eth0:

        Supported ports: [ TP MII ]

        Supported link modes:   10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

        Supported pause frame use: No

        Supports auto-negotiation: Yes

        Advertised link modes:  10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

        Advertised pause frame use: Symmetric Receive-only

        Advertised auto-negotiation: Yes

        Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                             100baseT/Half 100baseT/Full

        Link partner advertised pause frame use: Symmetric

        Link partner advertised auto-negotiation: Yes

        Speed: 100Mb/s

        Duplex: Full

        Port: MII

        PHYAD: 1

        Transceiver: internal

        Auto-negotiation: on

        Supports Wake-on: pumbag

        Wake-on: d

        Current message level: 0x00000007 (7)

                               drv probe link

        Link detected: yes

 

Meu ethtool eth1

Settings for eth1:

        Supported ports: [ TP MII ]

        Supported link modes:   10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

        Supported pause frame use: No

        Supports auto-negotiation: Yes

        Advertised link modes:  10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

        Advertised pause frame use: Symmetric Receive-only

        Advertised auto-negotiation: Yes

        Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                             100baseT/Half 100baseT/Full

        Link partner advertised pause frame use: Symmetric Receive-only

        Link partner advertised auto-negotiation: Yes

        Speed: 100Mb/s

        Duplex: Full

        Port: MII

        PHYAD: 0

        Transceiver: internal

        Auto-negotiation: on

        Current message level: 0x00000007 (7)

                               drv probe link

        Link detected: yes

 

Como observado, ambas as placas trabalhando 100mpbs.
Contudo, realizando o teste de velocidade da internet diretamente no servido, consigo 6.32 Mpbs de download e 0.88 Mpbs de upload. Contudo, quando conecto uma máquina na rede wifi ligada a eth1, a velocidade de do teste de download cai pela metade, para 3.75 Mpbs.
O que poder estar fazendo essa queda na velocidade? Poderiam me ajudar?
Desde já agradeço a todos.