Set Arp Encapsulation - Cisco WS-C3550-12G Software Configuration Manual
Multilayer switch
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- User manual (436 pages) ,
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Configuring IP Addressing
This is an example of output from the show arp privileged EXEC command.
Switch# show arp
Protocol
Internet
Internet
Internet
Internet
Internet
Internet
Internet
Internet
Internet
Internet
Internet
Note
For the Catalyst 3550 switch, the output from the show arp privileged EXEC command and the show
ip arp privileged EXEC command are usually the same.
Set ARP Encapsulation
By default, Ethernet ARP encapsulation (represented by the arpa keyword) is enabled on an IP interface.
You can change the encapsulation methods to SNAP if required by your network.
Beginning in privileged EXEC mode, follow these steps to specify the ARP encapsulation type:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
arp {arpa | snap}
Step 4
end
Step 5
show interfaces [interface-id]
Step 6
copy running-config startup-config
To disable an encapsulation type, use the no arp arpa or no arp snap interface configuration command.
Catalyst 3550 Multilayer Switch Software Configuration Guide
22-12
Address
Age (min)
10.1.2.3
172.20.136.9
120
172.20.250.42
149
120.20.30.1
172.20.139.152
101
172.20.139.130
205
172.20.141.225
186
172.20.135.204
169
172.20.135.202
172.20.135.197
172
172.20.135.196
156
Hardware Addr
Type
-
0002.4b29.2e00
ARPA
0030.19c6.54e1
ARPA
0030.19c6.54e1
ARPA
-
0002.4b29.2e00
ARPA
0030.19c6.54e1
ARPA
0030.19c6.54e1
ARPA
0030.19c6.54e1
ARPA
0002.4b29.4400
ARPA
-
0002.4b29.2e00
ARPA
0002.4b28.ce80
ARPA
0002.4b28.ce00
ARPA
Purpose
Enter global configuration mode.
Enter interface configuration mode, and specify the Layer 3
interface to configure.
Specify the ARP encapsulation method:
arpa—Address Resolution Protocol
•
snap—Subnetwork Address Protocol
•
Return to privileged EXEC mode.
Verify ARP encapsulation configuration on all interfaces or
the specified interface.
(Optional) Save your entries in the configuration file.
Chapter 22
Configuring IP Unicast Routing
Interface
GigabitEthernet0/10
Vlan1
Vlan1
Vlan27
Vlan1
Vlan1
Vlan1
Vlan1
Vlan1
Vlan1
Vlan1
78-11194-03
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Troubleshooting
