What is the PPPoE MTU size?
It is generally recommended that the MTU for a WAN interface connected to a PPPoE DSL network be 1492. In fact, with auto MTU discovery, 1492 is discovered to be the maximum allowed MTU.
What is the default MTU size on a Cisco router?
1500 bytes
The default maximum transmission unit (MTU) size for frames received and sent on all switch interfaces is 1500 bytes. You can change the MTU size to support switched jumbo frames on all Gigabit Ethernet and 10-Gigabit Ethernet interfaces and to support routed frames on all routed ports.
Is 1500 MTU size good?
The size of an MTU is governed by the physical properties of the communications media. Historically, network media were slower and more prone to error, so MTU sizes were set to be relatively small. For most Ethernet networks this is 1500 bytes, and this size is used almost universally on access networks.
What is Cisco MTU?
Maximum Transmission Unit (MTU) is the largest size in bytes that a certain layer can forward. The MTU is different for each protocol and medium that we use. Ethernet for example has a MTU of 1500 bytes by default.
What is a good MTU for gaming?
When using a broadband connection the mtu’s are defaulted to size 1500 mtu(for general uses and speed, which this is the best setting for ). But for gaming the best setting is 576 mtu, (which is also the best all round setting for dial-up).
What is the MTU for PPPoE?
PPPoE needs additional 8 bytes and truncates the Ethernet MTU to 1492, and if the effective MTU on the hosts is not changed, the router in between the host and the server can terminate the TCP sessions. This command IP TCP ADJUST-MSS 1452 is recommended in the PPPoE configurations.
What is the maximum MTU of an interface?
The maximum MTU of an interface will depend on the hardware platform, but the IEEE 802.3 standards require a minimum MTU of 1500 bytes. PPPoE needs additional 8 bytes and truncates the Ethernet MTU to 1492, and if the effective MTU on the hosts is not changed, the router in between the host and the server can terminate the TCP sessions.
How do I change the MTU size on a Cisco router?
You can change the MTU size with the help of one of these three methods: Adjust the PPPoE MTU size on the Cisco DSL router. Download the Dr. TCP utility that automatically modifies the MTU setting. Add and then modify a “MaxMTU” string-value to the registry key that contains the PC Ethernet adapter.
What does ICMP resend with a smaller MTU mean?
The ICMP informs the web server that it sent an oversized packet and that it needs to resend the packet with a smaller MTU. Note: For information about why the MTU size is 1492 bytes, refer to the PPPoE Baseline Architecture for the Cisco 6400 white paper.