05-30-2002 06:45 AM - edited 03-12-2019 07:01 PM
In a IP telephony call, how much bandwidth is typically used for the skinny protocol traffic control? I am setting up QoS for the control protocol and wondered how much should be provisioned per call?
Thanks in advance
05-30-2002 07:02 AM
Skinny protocol doesn't use much bandwidth. Reserve around .5kbps per voice channel.
05-30-2002 07:03 PM
According to Cisco IP Telephony Solution Reference Network Design Guide Cisco CallManager Release 3.1 and 3.2 May 2002 you do require some bandwidth for call control (SCCP) and it depends on the number of IP endpoints that are deployed.
You can find this document under:
IP Telephony Solution Reference Network Document
CallManager Releases 3.1 and 3.2
http://www.cisco.com/warp/public/779/largeent/netpro/avvid/srnd.html
On the page 3-9 you can find recommended values.
Regards,
Vakhtang.
05-31-2002 12:21 PM
In most of the documentation I read... it can never get above 8kbps. I set up QOS in like this and it worked fine. I never had any problems. Of course I was using ppp but the same class map works for frame-relay.
!
!
class-map match-any VoIP-Control
match access-group 101
class-map match-any VoIP-RTP
match access-group 100
!
policy-map QoS-Policy
class VoIP-Control
bandwidth 8
class VoIP-RTP
priority 512
class class-default
fair-queue
!
interface Serial0/0
ip address 192.168.101.245 255.255.255.252
encapsulation ppp
load-interval 30
service-policy output QoS-Policy
!
access-list 100 permit udp any any range 16384 32767
access-list 100 permit ip any any precedence critical
access-list 100 permit ip any any dscp ef
access-list 101 permit tcp any any range 2000 2002
access-list 101 permit tcp any any eq 1720
access-list 101 permit tcp any any range 11000 11999
access-list 101 permit udp any any eq 2427
access-list 101 permit ip any any precedence flash
access-list 101 permit ip any any dscp af31
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