---> The default encapsulation type for ethernet interfaces is ARPA and for FDDI is SNAP.
----> All the devices connected to ethernet or fddi must have the same encapsulation type otherwise they will not able to communicate.
---> If you not assigned any encapsulation protocol for ethernet interfaces, by default it takes ARPA.
Commands:
# Interface fastethernet 0/0
# Encapsulation arpa
--> ARP is used to map an IP address to an MAC address. If you want to add static entry in the ARP then use the following commands.
# arp [ip address] [hardware address] encap-type [arpa/snap]
#arp 10.1.1.1 0012.2345.4567 arpa
--> If your device mac address is not there in the arp table then it may have the following problems
i) Encapsulation Type Mismatch
ii) Interface may be down
iii) Cable may not be working
--> You can use the following command to know the problem or to troubleshoot.
# debug arp
--> You can check the MAC address table with the help of the following command.
# Show mac-address-table
--> you can check ARP table with the help of the following command.
# show arp
--> You can check the interface bandwidth,delay,encapsulation type,load,reliability and MTU with the help of the following command.
# show interface fastethernet 0/1
Thanks for reading.........................
----> All the devices connected to ethernet or fddi must have the same encapsulation type otherwise they will not able to communicate.
---> If you not assigned any encapsulation protocol for ethernet interfaces, by default it takes ARPA.
Commands:
# Interface fastethernet 0/0
# Encapsulation arpa
--> ARP is used to map an IP address to an MAC address. If you want to add static entry in the ARP then use the following commands.
# arp [ip address] [hardware address] encap-type [arpa/snap]
#arp 10.1.1.1 0012.2345.4567 arpa
--> If your device mac address is not there in the arp table then it may have the following problems
i) Encapsulation Type Mismatch
ii) Interface may be down
iii) Cable may not be working
--> You can use the following command to know the problem or to troubleshoot.
# debug arp
--> You can check the MAC address table with the help of the following command.
# Show mac-address-table
--> you can check ARP table with the help of the following command.
# show arp
--> You can check the interface bandwidth,delay,encapsulation type,load,reliability and MTU with the help of the following command.
# show interface fastethernet 0/1
Thanks for reading.........................