Notice the following information while looking at the wan ip traffic
I was wondering how bad the couldnt fragment count should be. There are GRE tunnels involved here and the count increased by 1800 over night. We have seen from the sniffs that some devices send the packet with the DF set and then renegotiate their packet sizes and every thing goes on its way. Just wondering what is bad and what is acceptable
It is better to have a lot of "couldn't fragment" than a lot of "fragment". Fragmentation is usually not a good thing in a network. It causes overhead on the router having to fragment packets and the destination device having to reassemble them.
The "no port" under the UDP section is due to a UDP message with the destination address of the local being received but the UDP destination port doesn't exist.
It causes the router to send an ICMP destination port unreachable message to the source of the UDP packets unless "no ip unreachable" is configured on the ingress interface.
This counter would be incremented for instance if you do a traceroute to this router or if someone is doing a port scan.
Let me know if I answered your question,
Harold Ritter Sr. Technical Leader CCIE 4168 (R&S, SP) email@example.com México móvil: +52 1 55 8312 4915 Cisco México Paseo de la Reforma 222 Piso 19 Cuauhtémoc, Juárez Ciudad de México, 06600 México
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...