MTU settings on ES450


We currently have a problem with the MTU size on our network. The modem is configured in passthrough mode and connected to a cisco router. I did a firmware update some time ago and its now on version 4.8.1. Thats when the MTU problem started. There’s packet drops so we limited the MTU size to 1460 on the router’s port but id like to do it directly on the modem. Can anyone tell me where the option is on this modem?


Hi martinR80,

You can try to change the interface MTU of the ES450 in AceManager by navigating to LAN > DHCP/Addressing > DHCP Options, and change the MTU Source to Manual and configure option 26 to whatever value you’d like.