BOOTP/DHCP Relay
Page 26-6
External BOOTP Relay
The
BOOTP
relay may be configured on a router that is external to the switch. In this applica-
tion example the switched network has a single AutoTracker Group configured with multiple
segments. All of the network hosts are
DHCP
-ready, meaning they obtain their network
address from the
DHCP
server. The
DHCP
server resides behind an external network router,
which supports the
BOOTP
relay functionality.
One requirement for routing
DHCP
frames is that the router must support
BOOTP
relay func-
tionality to be able to forward
DHCP
frames. In this example,
BOOTP
relay is supported within
an external router, which forwards request frames from the incoming router port to the outgo-
ing router port attached to the Omni Switch/Router.
DHCP Clients are Members of the Same VLAN
The external router inserts the subnet address of the first hop segment into the
DHCP
request
frames from the
DHCP
clients. This subnet address allows the
DHCP
server to locate the
segment that the requesting client resides on. In this example, all clients attached to the Omni
Switch/Router are
DHCP
-ready and will have the same subnet address (130.0.0.0) inserted into
each of the requests by the router’s
BOOTP
relay function. The
DHCP
server will assign a
different IP address to each of the clients. The switch does not need an IP address assigned
and all
DHCP
clients will be members of either a default
VLAN
or an IP protocol
VLAN
.
Omni Switch/Router
12345678
123456
Group 1
DHCP Client
s
130.0.0.11
130.0.0.12
DHCP Clients
130.0.0.14
130.0.0.13
DHCP Client
s
130.0.0.15
DHCP Server
125.0.0.1
125.0.0.2
External
BOOTP
Relay
DHCP Client
Содержание Omni Switch/Router
Страница 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Страница 4: ...page iv ...
Страница 110: ...WAN Modules Page 3 40 ...
Страница 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Страница 164: ...Using ZMODEM Page 5 8 ...
Страница 186: ...Displaying and Setting the Swap State Page 6 22 ...
Страница 202: ...Creating a New File System Page 7 16 ...
Страница 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Страница 430: ...OmniChannel Page 15 16 ...
Страница 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Страница 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Страница 646: ...Application Example DHCP Policies Page 20 30 ...
Страница 660: ...GMAP Page 21 14 ...
Страница 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Страница 722: ...Application Example 5 Page 24 12 ...
Страница 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Страница 872: ...The WAN Port Software Menu Page 28 46 ...
Страница 960: ...Deleting a PPP Entity Page 30 22 ...
Страница 978: ...Displaying Link Status Page 31 18 ...
Страница 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Страница 1024: ...Backup Services Commands Page 34 14 ...
Страница 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Страница 1072: ...Configuring a Switch with an MPX Page A 10 ...
Страница 1086: ...Page B 14 ...
Страница 1100: ...Page I 14 Index ...