Removing An Atm Arp Cache Entry; Flushing The Atm Arp Cache; Administering Udp Helper - 3Com CoreBuilder 2500 User Manual

Removing an ATM
ARP Cache Entry
Top-Level Menu
system
ethernet
interface
fddi
route
display
atm
arp
define
bridge
display
remove
atmArpServer
ip
remove
multicast arp
ipx
flush
udpHelper
appletalk
routing
snmp
icmpRouterDiscovery
analyzer
ospf
script
rip
logout
ping
statistics
Flushing the ATM
ARP Cache
Top-Level Menu
system
ethernet
interface
fddi
route display
atm
arp
define
bridge
display
remove
atmArpServer
ip
remove
arp
multicast
ipx
flush
udpHelper
appletalk
routing
snmp
icmpRouterDiscovery
analyzer
ospf
script
rip
logout
ping
statistics
Administering
UDP Helper
To remove an entry from the ATM ARP cache, from the top level of the
Administration Console, enter:
ip atmArpServer arp remove
Enter the ATM address that you want to remove from the cache.
The address is immediately removed from the table.
To remove all entries from the ATM ARP cache, from the top level of the
Administration Console, enter:
ip atmArpServer arp flush
All ATM ARP cache entries are immediately removed from the table.
Use UDP Helper to send User Datagram Protocol (UDP) packets between
routed networks. UDP Helper provides support for UDP services, such as
BOOTP or DHCP (Dynamic Host Configuration Protocol), that rely on the
BOOTP relay agent. For example, by configuring the logical BOOTP port,
you can boot hosts through the router. UDP Helper also provides a relay
agent for DHCP broadcasts. UDP packets that rely on the BOOTP relay
agent are modified and then forwarded through the router.
These ports for UDP services are mentioned in this section on UDP Helper:
BOOTP (including DHCP) = 67
TIME = 37
DNS = 53
With UDP Helper, you can configure the interval of time during which
forwarding can occur between subnetworks. UDP packets are discarded
based on the hop count and seconds value only for BOOTP and DHCP.

Administering UDP Helper 10-15