HP 200 Series Services And Applications page 96
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Also See for 200 Series:
- Installation manual (144 pages) ,
- Hardware support document (95 pages) ,
- Instructions manual (7 pages)
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Bridging Service
Source-Routing Bridging
1
End Node
1
Figure 31. Sample Network for Hop Count
Hop Count Reduction Algorithm Enabled
In figure 31 (above), with Hop Count Reduction set to Yes, end node 1 sends
an explorer frame. The RIF at ring 1 is 8270; the RIF at ring 2 is 8670 0011
0020.
The bridging HP router, with internal LAN ID 3 and bridge ID 3, receives the
frame from ring 2 and saves this RIF as the path to end node 1. It then
removes the RIF from the frame and inserts its internal LAN ID and the
outgoing LAN ID. The RIF at ring 4 is then 8670 0033 0040; the RIF at ring 5
is 8870 0033 0044 0050.
End node 2 received the explorer frame and saved the RIF as the path to end
node 1. End node 2 then responds with a specifically routed frame. The RIF
at ring 4 is then 88F0 0033 0044 0050.
The bridging HP router receives this frame on ring 4. The RIF is saved as the
path to end node 2. The RIF is removed from the frame and replaced with
the RIF saved as the path to end node 1. The RIF on ring 2 of the frame head-
ing back to end node 1 is then 88F0 0011 0023 0030. End node 1 saves this
RIF as the path to end node 2.
Hop Count Reduction Algorithm Disabled
In figure 31 (above), with Hop Count Reduction set to the default No, end
node 1 sends an explorer frame. The RIF at ring 1 is 8270; the RIF at ring 2 is
8670 0011 0020.
The bridging HP router receives the frame from ring 2 and learns that to get
from the router to ring 1 through bridge 1, it needs to send the frame out
through ring 2. The router then overwrites the routing designator of the
incoming ring, in this case ring 2, with its internal LAN ID, adds the outgoing
ring, and then sends the frame out to ring 4. The RIF at ring 4 is 8870 0011
0033 0040, and the RIF at ring 5 is 8A70 0011 0033 0044 0050.
End node 2 receives the explorer frame and saves the RIF as the path to end
node 1. End node 2 responds with a specifcally routed frame. The RIF at ring
4 is then 8AF0 0011 0033 0044 0050.
2-44
HP Router
Bridge 1
2
(Bridging)
Internal LAN ID 3
Bridge ID 3
Bridge 4
4
5
End Node
2
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