Cisco NCS 540 Series Configuration Manual - Page 2
Browse online or download pdf Configuration Manual for Network Router Cisco NCS 540 Series. Cisco NCS 540 Series 19 pages. Arp commands
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arp
vrf-name
ip-address
hardware-address
encapsulation-type
alias
No entries are permanently installed in the ARP cache.
Command Default
XR Config mode
Command Modes
Command History
Release
Release 6.0
The software uses ARP cache entries to translate 32-bit IP addresses into 48-bit hardware addresses.
Usage Guidelines
Because most hosts support dynamic resolution, you generally need not specify static ARP cache entries.
Static entries are permanent entries that map a network layer address (IPv4 address) to a data-link layer address
(MAC address). If the alias keyword is specified when creating the entry, the interface to which the entry
is attached will act as if it is the owner of the specified addresses, that is, it will respond to ARP request packets
for this network layer address with the data link layer address in the entry.
The software does not respond to any ARP requests received for the specified IP address unless proxy ARP
is enabled on the interface on which the request is received. When proxy ARP is enabled, the software responds
to ARP requests with its own local interface hardware address.
To remove all nonstatic entries from the ARP cache, enter the
Task ID
Task
ID
cef
Examples
The following is an example of a static ARP entry for a typical Ethernet host:
ARP Commands
2
(Optional) VRF instance that identifies a VPN.
IPv4 (network layer) address for which a permanent entry is added to the ARP cache.
Enter the IPv4 address in a four-part dotted-decimal format that corresponds to the local
data-link address (a 32-bit address).
Hardware (data link layer) address that the IPv4 address is linked to. Enter the local
data-link address (a 48-bit address), such as 0800.0900.1834.
Encapsulation type. The encapsulation types are:
• arpa
• srp
• srpa
• srpb
For Ethernet interfaces, this is typically the arpa keyword.
(Optional) Causes the software to respond to ARP requests as if it were the owner of
both the specified IP address and hardware address, whether proxy ARP is enabled or
not.
Modification
This command was introduced.
Operations
read,
write
clear arp-cache, on page 6
in XR EXEC mode.
ARP Commands