105
D14049.04
JULY 2008
Grey Headline
(continued)
To configure the hop count for a zone:
VCS Configuration > Zones.
•
You will be taken to the
Zones
page.
Click on the name of the zone you wish to configure.
You will be taken to the
Edit Zone
page.
In the
Configuration
section, in the
Hop Count
field, enter the hop count value you wish to use for
this zone.
xConfiguration Zones Zone [1..200] HopCoun
•
t
Each search request is assigned a hop count value by the
system that initiates the search. Every time the request is
forwarded to another neighbor gatekeeper or proxy, the hop
count value is decreased by a value of 1. When the hop count
reaches 0, the request will not be forwarded on any further.
For search requests initiated by the local VCS, the hop count
assigned to the request is configurable on a zone-by-zone basis.
The zone’s hop count will apply to all search requests originating
from the local VCS that are sent to that zone.
Search requests received from another zone will already have
a hop count assigned. When the request is subsequently
forwarded on to a neighbor zone, the lower of the two values
(i.e. the original hop count or the hop count configured for that
zone) will be used.
For H.323, the hop count only applies to search requests.
For SIP, the hop count applies to all requests sent to a zone,
affecting the Max-Forwards field in the request.
The hop count value can be between
1
and
255
.
The default is
15
.
When dialing by URI or ENUM, the hop count used is that
for the associated DNS or ENUM zone via which the
destination endpoint (or intermediary SIP Proxy or
gatekeeper) was found.
About Hop Counts
For full details on
other zone options,
see
Configuring Zones
.
Configuring Hop Counts
!
If your hop counts are set higher than necessary, you may
risk introducing loops into your network. In these
situations a search request will be sent around the
network until the hop count reaches 0, consuming resources
unnecessarily.
TANDBERG
VIDEO COMMUNICATIONS SERVER
ADMINISTRATOR GUIDE
Introduction
Getting Started
Overview and
Status
System
Configuration
VCS
Configuration
Zones and
Neighbors
Call
Processing
Bandwidth
Control
Firewall
Traversal
Appendices
Applications
Maintenance
Hop Counts
