Cisco Cisco TelePresence MCU 4510 Maintenance Manual
Configuring network and system settings
Cisco TelePresence MCU 4.3 Product administration guide
Page 182 of 242
Click Update QoS settings after making any changes.
Field
Field description
Usage tips
IPv4 configuration
Audio
Six bit binary field for prioritizing audio data packets on the
network.
network.
Do not alter this setting unless you
need to.
need to.
Video
Six bit binary field for prioritizing video data packets on the
network.
network.
Do not alter this setting unless you
need to.
need to.
IPv6 configuration
Audio
Six bit binary field for prioritizing audio data packets on the
network.
network.
Do not alter this setting unless you
need to.
need to.
Video
Six bit binary field for prioritizing video data packets on the
network.
network.
Do not alter this setting unless you
need to.
need to.
ToS configuration
ToS configuration represents a tradeoff between the abstract parameters of precedence, delay, throughput,
and reliability.
and reliability.
ToS uses six out of a possible eight bits. The MCU allows you to set bits 0 to 5, and will place zeros for bits 6
and 7.
and 7.
n
Bits 0-2 set IP precedence (the priority of the packet).
n
Bit 3 sets delay: 0 = normal delay, 1 = low delay.
n
Bit 4 sets throughput: 0 = normal throughput, 1 = high throughput.
n
Bit 5 sets reliability: 0 = normal reliability, 1 = high reliability.
n
Bits 6-7 are reserved for future use and cannot be set using the MCU interface.
You need to create a balance by assigning priority to audio and video packets whilst not causing undue delay
to other packets on the network. For example, do not set every value to 1.
to other packets on the network. For example, do not set every value to 1.
DiffServ configuration
DiffServ uses six out of a possible eight bits to set a codepoint. (There are 64 possible
codepoints.) The MCU allows you to set bits 0 to 5, and will place zeros for bits 6 and 7.
The codepoint is interpreted by DiffServ nodes to determine how the packet is treated.
codepoints.) The MCU allows you to set bits 0 to 5, and will place zeros for bits 6 and 7.
The codepoint is interpreted by DiffServ nodes to determine how the packet is treated.
Default settings
The default settings for QoS are:
n
Audio 101110:
l
For ToS, this means IP precedence is set to 5 giving relatively high priority. Delay is set to low,
throughput is set to high, and reliability is set to normal.
throughput is set to high, and reliability is set to normal.
l
For Diff Serv, this means expedited forwarding.