Frame Relay IP Routing
Page 29-16
An InARP message is sent between the two routers indicating their IP addresses and associ-
ated VC. Once they know each other’s IP address and the
DLCI
of the VC on each end of the
link (the same VC may have a different
DLCIs
on each end), then they can begin normal rout-
ing of RIP frames, etc.
The Frame Relay Subnet and “Split Horizon”
The IP protocol must account for the Frame Relay network in making routing decisions. After
all, the
WAN
network is more than just a single cable, or even several cables, attaching two
routers. The solution is to assign the Frame Relay network a unique IP subnet.
Frame Relay Network Is an IP SubNet
In the configuration shown above, one virtual circuit connects the
WSX
router on IP Subnet
1.1.1.x and the other router on IP Subnet 3.3.3.x. The Frame Relay network, for routing
purposes, is considered to be IP Subnet 2.2.2.x. Routing decisions are straightforward in this
setup. But if another Router and another IP Subnet were added, a special routing technique
must be devised.
R
WSX
Subnet 1.1.1.X
Subnet 3.3.3.X
Subnet 2.2.2.X
Frame Relay network consid-
ered a unique IP Subnet by IP.
Virtual circuit connects
two
WAN
Routers.
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 ...