SG-3100 is Bottlenecking Gigabit

zachzez

I've been reading the forum a bit to see if there's a solution and I didn't find one that resolved my issue (a few people had similar problems but none of their solutions explicitly resolved mine) so I'm hoping to troubleshoot with you all here.

I have a SG-3100 along with a Gigabit Comcast connection. I receive speeds consistently at about 700 Mbps. I confirmed with the Comcast tech that did some troubleshooting in my home that I am receiving 978 Mbps from the modem.

Package wise, I'm running Avahi, openvpn, and pfb_dnsbl so nothing too intensive. When disabling these services, I still receive lower than expected speeds.

Interface health wise, everything is looking good for the WAN:

WAN Interface (wan, mvneta2)

Status
    up 
DHCP
    up 

        Relinquish Lease
MAC Address
    xxxxxxxxxxx
IPv4 Address
    xxxxxxxxxxx
Subnet mask IPv4
    255.255.252.0 
Gateway IPv4
    xxxxxxxxxxx
IPv6 Link Local
   xxxxxxxxxxx
Gateway IPv6
   xxxxxxxxxxx 
MTU
    1500 
Media
    1000baseT <full-duplex> 
In/out packets
    5758770/1695175 (3.89 GiB/319.75 MiB) 
In/out packets (pass)
    5758770/1695175 (3.89 GiB/319.75 MiB) 
In/out packets (block)
    1919/17 (1.24 MiB/2 KiB) 
In/out errors
    0/0 
Collisions
    0

When running a speed test, system resources are looking good without anything maxing out the processor. mvneta2 sits at about 30% utilization.

Definitely happy to add any additional troubleshooting evidence to assist and I appreciate anyone's help in advance.

rcoleman-netgate

@zachzez That speed is about what I had on my 3100 on my FTTP 1GbE symmetrical service in my previous apartment.

zachzez

@rcoleman-netgate Fascinating, is there overhead that causes that much loss? For some reason I remember seeing benchmarks when the appliance first came out showing solid gigabit routing.

rcoleman-netgate

@zachzez I think I topped out at 840. You could try the OPT port if you think there's an issue with the IC for mvneta2.

zachzez

@rcoleman-netgate Just moved it to OPT just to see. Definitely still too early to tell if it works but speeds are peaking at 950 Mbps.

Out of curiosity, I’m assuming Netgates SG-4100 is the go to gigabit appliance currently?

stephenw10

Indeed the 4100 will pass 1Gbps easily.

mr_nets

I'm curious, did you create one or more VLAN on the LAN interface you did the speed test, because I get about the same speed ( 840 Mbits ) with 2 ou 3 VLAN, without VLAN it get full speed ? I've about the same packages installed (Avahi, pfBlocker) but on 6100