System information

Troubleshooting TCP/IP
Book Title
7-120
Table 7-10 Host and Router Subnet Mask Mismatch Example
The host interprets the IP address 192.31.7.49 as being Host 1 on the third subnet (subnet
address 48). However, because it is using a different subnet mask, the router interprets the address
as being Host 17 on the first subnet (subnet address 32). Depending on the network topology and the
router configuration, packets destined for IP address 192.31.7.49 might be sent to the wrong
destination host, sent from the wrong interface, or dropped altogether.
Routing Information Host Value Router Value
Destination IP address 192.31.7.49 192.31.7.49
Subnet mask 255.255.255.240 255.255.255.224
Interpreted address Subnet address 48, host 1 Subnet address 32, host 17