Foundry Configuration Guide for the FESX, FSX, and FWSX
16 - 56
© Foundry Networks, Inc.
December 2005
Figure 16.8
DHCP offers are forwarded back toward the requestors
Configuring DHCP Assist
You can associate a gateway list with a port. You must configure a gateway list when DHCP Assist is enabled on
a Foundry Layer 2 Switch. The gateway list contains a gateway address for each sub-net that will be requesting
addresses from a DHCP server. The list allows the stamping process to occur. Each gateway address defined on
the Layer 2 Switch corresponds to an IP address of the Foundry router interface or other router involved.
Up to eight addresses can be defined for each gateway list in support of ports that are multi-homed. When
multiple IP addresses are configured for a gateway list, the Layer 2 Switch inserts the addresses into the discovery
packet in a round robin fashion.
Up to 32 gateway lists can be defined for each Layer 2 Switch.
EXAMPLE:
To create the configuration indicated in Figure 16.7 and Figure 16.8:
FESX424 Switch(config)# dhcp-gateway-list 1 192.95.5.1
FESX424 Switch(config)# dhcp-gateway-list 2 200.95.6.1
FESX424 Switch(config)# dhcp-gateway-list 3 202.95.1.1 202.95.5.1
FESX424 Switch(config)# int e 2
FESX424 Switch(config-if-e1000-2)# dhcp-gateway-list 1
FESX424 Switch(config-if-e1000-2)# int e8
FESX424 Switch(config-if-e1000-8)# dhcp-gateway-list 3
FESX424 Switch(config-if-e1000-8)# int e 14
FESX424 Switch(config-if-e1000-14)# dhcp-gateway-list 2
Server
Server
DHCP
Server
207.95.7.6
192.95.5.x
Host 1
192.95.5.10
200.95.6.15
200.95.6.x
Host 2
Sub-net 1
Host 3
Host 4
Router
202.95.1.x
Sub-net 3
Sub-net 2
202.95.5.25
202.95.1.35
DHCP response withIP addresses
for Sub-nets 1, 2, 3 and 4
192.95.5.10
200.95.6.15
202.95.1.35
202.95.5.25
202.95.5.x
Sub-net 4
Step 4:
DHCP Server extracts the gateway
address from each pack et and
assigns IP addresses for each
host withinthe appropriate
range .
Step 5:
IP addresses are distributed
to the appropriate hosts.
FESX
Hub
Содержание FastIron Edge Switch X424
Страница 36: ...Foundry Configuration Guide for the FESX FSX and FWSX 2 12 Foundry Networks Inc December 2005...
Страница 56: ...Foundry Configuration Guide for the FESX FSX and FWSX 3 20 Foundry Networks Inc December 2005...
Страница 70: ...Foundry Configuration Guide for the FESX FSX and FWSX 4 14 Foundry Networks Inc December 2005...
Страница 198: ...Foundry Configuration Guide for the FESX FSX and FWSX 8 38 Foundry Networks Inc December 2005...
Страница 316: ...Foundry Configuration Guide for the FESX FSX and FWSX 12 26 Foundry Networks Inc December 2005...
Страница 334: ...Foundry Configuration Guide for the FESX FSX and FWSX 13 18 Foundry Networks Inc December 22 2005...
Страница 350: ...Foundry Configuration Guide for the FESX FSX and FWSX 15 12 Foundry Networks Inc December 2005...
Страница 458: ...Foundry Configuration Guide for the FESX FSX and FWSX 18 18 Foundry Networks Inc December 2005...
Страница 712: ...Foundry Configuration Guide for the FESX FSX and FWSX 22 32 Foundry Networks Inc December 2005...
Страница 760: ...Foundry Configuration Guide for the FESX FSX and FWSX A 34 Foundry Networks Inc December 2005...
Страница 796: ...Foundry Configuration Guide for the FESX FSX and FWSX C 18 Foundry Networks Inc December 2005...
Страница 820: ...Foundry Configuration Guide for the FESX FSX and FWSX E 10 Foundry Networks Inc December 2005...