Cisco Cisco IPCC Web Option Guide De Conception
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12-19
Cisco Unified Contact Center Enterprise 7.5 SRND
Chapter 12 Bandwidth Provisioning and QoS Considerations
Bandwidth Provisioning
For the combined dedicated link in this example, the results are as follows:
•
Total Link = 2,550,000 bps
•
Router/Logger high-priority bandwidth queue of 264,000 bps
•
PG high-priority bandwidth queue of 1,998,000 bps
If this example were implemented with two separate links, Router/Logger private and PG private, the
link sizes and queues would be as follows:
link sizes and queues would be as follows:
•
Router/Logger link of 330,000 bps (actual minimum link is 1.5 Mb, as defined earlier), with
high-priority bandwidth queue of 264,000 bps
high-priority bandwidth queue of 264,000 bps
•
PG link of 2,220,000 bps, with high-priority bandwidth queue of 1,998,000 bps
When using Multilink Point-to-Point Protocol (MLPPP) for private networks, Cisco recommends the
following attributes for the MLPPP link:
following attributes for the MLPPP link:
•
Use per-destination load balancing instead of per-packet load balancing.
Note
You must have two separate multilinks with one link each for per-destination load balancing.
•
Enable Point-to-Point Protocol (PPP) fragmentation to reduce serialization delay.
Bandwidth Requirements for Unified CCE Clustering Over the WAN
For details about Unified CCE clustering over the WAN, see
.
Bandwidth must be guaranteed across the highly available (HA) WAN for all Unified ICM private,
public, CTI, and Unified CM intra-cluster communication signaling (ICCS). Moreover, bandwidth must
be guaranteed for any calls going across the highly available WAN. Minimum total bandwidth required
across the highly available WAN for all Unified CCE signaling is 2 Mbps.
public, CTI, and Unified CM intra-cluster communication signaling (ICCS). Moreover, bandwidth must
be guaranteed for any calls going across the highly available WAN. Minimum total bandwidth required
across the highly available WAN for all Unified CCE signaling is 2 Mbps.
In addition to the bandwidth requirements for the private and public networks, this section adds
bandwidth analysis for the connections from Unified IP IVR or Unified CVP PG to Unified IP IVR or
Unified CVP, CTI Server to CTI OS, and Unified CM intra-cluster communication signaling (ICCS).
bandwidth analysis for the connections from Unified IP IVR or Unified CVP PG to Unified IP IVR or
Unified CVP, CTI Server to CTI OS, and Unified CM intra-cluster communication signaling (ICCS).
Unified CM PG
11,000
100
1,100,000
0.9
990,000
Add these three
numbers together
and total in the
shaded box below
to get the PG
High-Priority
Queue bandwidth.
numbers together
and total in the
shaded box below
to get the PG
High-Priority
Queue bandwidth.
Unified IP IVR
PG
PG
14,000
60
840,000
0.9
756,000
Unified CVP PG 0
120
0
0.9
0
Unified IP IVR
or Unified CVP
Variables
or Unified CVP
Variables
14,000
((Number of
Variables
Variables
Average
Variable Length) /
40)
40)
280,000
0.9
252,000
Total Link Size
2,550,000
1,998,000
Total PG
High-Priority Queue
Bandwidth
High-Priority Queue
Bandwidth
Table 12-6
Example Calculation for a Combined Dedicated Private Link (continued)
Component
Effective
BHCA
BHCA
Multiplication
Factor
Factor
Recommended
Link
Link
Multiplication
Factor
Factor
Recommended
Queue
Queue