What happens if a packet is too large?

If one of these packets is larger than the actual PMTU, a downstream router will not be able to forward the packet through the next link along the path. Therefore, the downstream router discards the packet and sends an Internet Control Message Protocol (ICMP) Packet Too Big (PTB) message to the source node.

Can a packet be too large?

Large packets occupy a slow link for more time than a smaller packet, causing greater delays to subsequent packets, and increasing network delay and delay variation. For example, a 1500-byte packet, the largest allowed by Ethernet at the network layer, ties up a 14.4k modem for about one second.

Can MSS be larger than MTU?

MSS is Maximum TCP segment size. MTU is used for fragmentation i.e packet larger than MTU is fragmented. But in case of MSS, packet larger than MSS is discarded. MSS is specified during TCP handshake basically in SYN and its value can’t be changed after the connection is established.

What happens when an IPv6 packet at the Max MTU of one network traverses to a second network with a smaller MTU?

If the MTU size is greater than the packet length, it continues to process the packet. If the MTU size is less than the packet length, it drops the packet and sends an ICMPv6 Packet Too Big message to the source node.

Does MTU size affect throughput?

The MTU size of the network can have a large impact on performance. The use of large MTU sizes allows the operating system to send fewer packets of a larger size to reach the same network throughput. If the workload is only sending small messages, then the larger MTU size will not help.

Why would you to send larger packets?

Sending larger volumes of data at a time reduces this overhead and thus the required network bandwidth. Depending on the protocols you are using, you may detect and compensate for lost packets. If larger volumes of data are sent at a time there is more to resend on failure.

What happens if MTU is different?

If the MTU mismatch occurs, NDN packets would be dropped and the transmission would fail. For each experiment, NDN packets are sent continuously for 10 min.

Is larger MTU more efficient than a smaller MTU Why?

Some networks have smaller MTUs, but the value is fixed for each physical technology. A larger MTU means that more data fits into fewer packets, which generally allows for faster and more efficient transmission.

Does packet size affect packet loss?

The experimental results showed that the packet size had different effects on the packet loss rate and the throughput of the TCP stream. The larger the packet size was, the greater the packet loss rate and throughput would have.