UDP Broadcast Flooding

!Router B
ip forward-protocol spanning-tree
ip forward-protocol udp 111
ip forward-protocol udp 3001
ip forward-protocol udp 3002
ip forward-protocol udp 3003
ip forward-protocol udp 3004
ip forward-protocol udp 3005
ip forward-protocol udp 3006
ip forward-protocol udp 5020
ip forward-protocol udp 5021
ip forward-protocol udp 5030
ip forward-protocol udp 5002
ip forward-protocol udp 1027
ip forward-protocol udp 657
!
interface ethernet 0
ip address 200.200.200.62 255.255.255.0
ip broadcast-address 200.200.200.255
no mop enabled
!
interface ethernet 1
ip address 164.53.7.62 255.255.255.192
ip broadcast-address 164.53.7.63
ip irdp
ip irdp maxadvertinterval 60
ip irdp minadvertinterval 45
ip irdp holdtime 60
ip irdp preference 90
bridge-group 1
bridge-group 1 path-cost 50
bridge-group 1 input-type-list 201
no mop enabled
!
interface ethernet 2
ip address 164.53.8.62 255.255.255.192
ip broadcast-address 164.53.8.63
ip irdp
ip irdp maxadvertinterval 60
ip irdp minadvertinterval 45
ip irdp holdtime 60
ip irdp preference 90
bridge-group 1
bridge-group 1 path-cost 50
bridge-group 1 input-type-list 201
no mop enabled
!
interface ethernet 3
ip address 164.53.9.62 255.255.255.192
ip broadcast-address 164.53.9.63
ip irdp
ip irdp maxadvertinterval 60
ip irdp minadvertinterval 45
ip irdp holdtime 60
ip irdp preference 90
bridge-group 1
bridge-group 1 path-cost 50
bridge-group 1 input-type-list 201
no mop enabled
!
interface ethernet 4
ip address 164.53.10.62 255.255.255.192
ip broadcast-address 164.53.10.63
ip irdp
ip irdp maxadvertinterval 60
ip irdp minadvertinterval 45
ip irdp holdtime 60
ip irdp preference 90
bridge-group 1
bridge-group 1 path-cost 50
bridge-group 1 input-type-list 201
no mop enabled
!
router igrp 1
network 164.53.0.0
!
ip name-server 255.255.255.255
snmp-server community public RW
snmp-server host 164.53.7.15 public
bridge 1 protocol dec
bridge 1 priority 255
access-list 201 deny 0xFFFF 0x0000

Summary

Although IP helper addressing is useful in networks that do not require redundancy, when configured in networks that feature redundancy, IP helper addressing results in packet duplication that severely reduces router and network performance.

By configuring UDP flooding, one router forwards UDP traffic without burdening the second router with duplicate packets. By dedicating one router to the task of forwarding UDP traffic, the second router becomes available for forwarding unicast traffic. At the same time, because each router is configured as the backup for the other router, redundancy is maintained; if either router fails, the other router can assume the work of the failed router without intervention from an operator. When compared with IP helper addressing, UDP flooding makes the most efficient use of router resources.

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原始作者:佚名	录入时间:2006-9-29 2:41:51
信息来源:不详	投稿信箱:itqoo@126.com