
Internet Protocol (IP) Addressing and Protocols
©2008 Allied Telesis Inc. All rights reserved.
22.4
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
Software Version 5.2.1
Deleting ARP Entries
To remove a static ARP entry, use the command:
awplus(config-if)#
no arp <ip-address>
To clear the ARP cache of dynamic entries, use the command:
awplus(config)#
clear arp-cache
This removes the dynamic ARP entries for all interfaces.
To display the entries in the ARP cache, use the command:
awplus(config)#
show arp
The ARP cache will be repopulated by the normal ARP learning mechanism. As long as the
entries are relearned quickly enough, deleting dynamic ARP entries does not affect:
■
routes
■
OSPF neighbor status
■
BGP peer status
■
the TCP/UDP connection status
■
VRRP status
Proxy ARP
Proxy ARP (defined in RFC 1027) allows hosts that do not support routing (i.e. they have no
knowledge of the network structure) to determine the physical addresses of hosts on other
networks. Your device intercepts ARP broadcast packets and substitutes its own physical
address for that of the remote host. This occurs only if your device has the best route to the
remote host. By responding to the ARP request, your device ensures that subsequent packets
from the local host are directed to its physical address, and it can then forward these to the
remote host. The process is symmetrical.
Proxy ARP is enabled by default. To disable proxy ARP on an interface, use the commands:
awplus(config)#
interface IFNAME
awplus(config-if)#
no ip proxy-arp
To enable Proxy ARP on an interface, use the command:
awplus(config-if)#
ip proxy-arp
Содержание AlliedWare Plus 5.2.1
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