Understanding the ICMP Protocol with Wireshark in Real Time
Jan 21, 2022 · Understanding ICMP Protocol with Wireshark in Real Time • Questions: • What is the MTU size of the ICMP packet at the Network Layer? • What is the MTU size of the ICMP packet at …
Firewall rules for ICMP (TCP/UDP port 7) - Cisco Learning Network
Sep 25, 2017 · From Google it looks like a legacy implementation. I remember doing my CCNA the first time around and found ACLs killed PING becasue Cisco routes used UDP and not true ICMP. I was …
Can't ping between router and switch - Cisco Learning Network
I can now ping g0/0 from switch but have to assign default-gateway of 192.168.10.2 on each switch for each switch to be able to ping router. I can ping router g0/1 172.16.1.1 from switch but cannot ping …
GNS3: ICMP Destination port unreachable - Cisco Learning Network
Ping, This is normal behavior. The traceroute function can be UDP-based. Basically packets are crafted to a random destination UDP port number. The packets are sent with TTL incrementing from 1 until …
Ping & traceroute protocols - Cisco Learning Network
Some traceroute implementations use TCP packets, such as tcptraceroute or layer four traceroute. Now, Cisco's implementation of traceroute also uses a sequence of UDP datagrams, each with …
ICMP with different port numbers - Cisco Learning Network
As ICMP works directly over IP layer, it does not carry any TCP/UDP ports, however, we can still issue ping and traceroute commands using different port numbers. I can understand that the port number …
ICMP echo reply Port? - Cisco Learning Network
ICMP echo reply Port? Hi everyone, There is a lot of debate on the Internet regarding ICMP being layer 3 or layer 4, as supposedly it uses port 7 for the latter as an echo reply (I did see someone comment …
Ping from routed switch to host - Cisco Learning Network
I want to be able to ping from the Vlan 1 interface so I can use host 1's tftp server as a backup. Host 1's IP: 192.168.2.3 Vlan 2's IP: 192.168.2.1 /25 The switches can ping each other's Vlan 1 interface …
Trying to ping the switch - Cisco Learning Network
Hello, I am absolutely new to CCNA. My question is: Is it possible to ping from PC to Switch? This is my lab: Subnet 192.168.10.0/24 for minimally 3 LANS. Program the LAN1 network (between the switch …
Ping with udp and tcp - Cisco Learning Network
ICMP is technically a layer 3 protocol, so does not utilise UDP or TCP. I would assume the PING application in your VPCs has some added functionality for network testing. If I need to test UDP or …