Cabletron Systems 1800 - Manual (Page 114)

8-22 SmartSwitch 1800 4. 0 User G uide, Rev 01
This configuration requires Port and Subscriber ID records in node 1 for:
●
Subscriber 00100 on RLP 0, Port 1
●
Subscriber 123* on RLP 1, Port 3
In node 2, RLP, Port, and Subscriber records must be configured for:
●
Subscriber 12301 on RLP0, port 0
●
Subscriber 12302 on RLP0, port 1
●
Subscriber 12303 on RLP0, port 2
●
Subscriber 12304 on RLP0, port 3
If subscriber 00100 sends a Call Request with any of called addresses 12301 through
12304 , node 1 searches for a match, finds 123* on Port 3, then routes the packet to node
2, RLP1, port 0, where node 2 reads the full called address in the packet and routes it
out the appropriate port.
Search Order for Subscriber Addresses
A subscriber address that includes a wildcard potentially matches more addresses than
one with no wildcards. For example, the address
* matches all other addresses.
Without a checking mechanism an address with no wildcards could be read as a match
for an address with a wildcard, and sent to the wrong place. To avoid this, a search
order has been established for performing call routing:
●
Addresses with no wildcards will be searched first.
●
Addresses with only ? wildcards will be checked next.
●
Addresses with * will be checked last.
Within each wildcard group, addresses with the most non-wildcard digits will be
checked first. For example,
311012345678* will be checked before 3110* .
Hunt Group Example
Here is an example of how the hunt group function works, using the algorithm Least
LCN With Thruput . The routing path process will calculate a loading factor based on
the number of LCNs in use and the line speeds for each Call Request received. The
method is proprietary, but is described generally here.
Ports and letter symbols in the example are:
Line Speed
RLP 0, port 0 2400 bps
RLP 1, port 0 4800 bps
RLP 1, port 1 in failed state, but is defined as a routing path
RLP 1, port 2 9600 bps
M = The maximum bps of any operational line in this routing path group.
w = The bps of an individual line.
U = A proprietary line utilization factor, taking into account the number of
active VCs on the line, and the line's speed.