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FLOWcontrol™ 70
© 2010 Datacom Systems Inc
VERSA
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stream
Aggregation Example:
Aggregate together the data stream
copies from multiple Network input
ports and send them all to a single
Monitor port (or send identical copies
of aggregated data to multiple Monitor
ports for use by different tools).
This may be helpful in a variety of
situations. For example:
a)Active / Passive redundant link pairs (or dynamically balanced link pairs - e.g.
Cisco Etherchannel or Nortel MLT) have been deployed and two different SPAN
ports are forwarding data copies from those links to the Network input ports
for purposes of providing continuous visibility on a single monitoring tool
interface.
b)A dynamic routing scheme such as Asymmetric Routing has been deployed and
traffic from a single conversation may be traversing different physical links -
two different SPAN ports are forwarding data copies from those links to the
Network input ports for purposes of providing continuous visibility on a single
monitoring tool interface.
a)The Network input ports are receiving data copies from SPAN ports or
aggregation taps that are deployed for visibility into lower utilization links at
the edge of the network and that data is to be viewed for overall statistical
purposes by a single monitoring tool interface.
The flow of network traffic in the
diagram above, can be replicated by
the Aggregation Configuration shown
below. Data received on Network Port
1 is sent to Monitor Port 5. Data
received on Network Port 2 is also sent
to Monitor Port 5. The monitoring
device connected to Monitor Port 5
receives data from both SPAN
connections.
When routing Network Ports to Monitor Ports, be aware of the connection
speed limitations of the devices connected to the Monitor Port. If four
1000BaseT Network Ports are aggregated and are all routed to the single