Table 6-6 Cisco Router Configuration Example
Current Configuration : 2023 bytes
version 12.3
hostname Cisco2621
|
class-map match-any VoIPClass (1)
match ip dscp cs5 (2)
policy-map VoIPPolicy (3)
class VoIPClass(4)
priority 50(5)
class class-default(6)
fair-queue(7)
|
interface FastEthernet0/0
description Connects to Dallas LAN
ip address 192.168.1.1 255.255.255.0
|
interface Serial0/0
description Connects to Fort Worth via Kilostream
bandwidth 256(8)
ip address 10.0.0.1 255.255.0.0
service-policy output VoIPPolicy(9)
encapsulation ppp
|
ip route 0.0.0.0 0.0.0.0 10.0.0.2
Configuration Example Explanation:
1. Defines a Class Map called VoIPClass.
2. Matches any packets that have the ToS field set to IP Precedence 5 / DSCP 40 and assigns them to VoIPClass.
3. Defines a Policy Map called VoIPPolicy.
4. Creates a Class called VoIPClass and assigns this to the VoIPPolicy.
5. Allocates 50Kbps of bandwidth to the VoIPClass.
6 & 7. Determines that any data that does not match VoIPClass should be processed using the “fair-queue” method (i.e.,
No Prioritization).
8. Determines the amount of bandwidth available on the Serial interface – essential for the QoS calculations.
9. Applies the VoIP Policy to any packets that exit the serial interface. This means that data being received (input)
does not use this policy.
SECTION 7 PORT DESIGNATIONS
IP Application IP Port Numbers Comments
SIP Trunk
SIP Trunk Signaling 5060 UDP
SIP Trunk Voice 10020~10083 UDP
3rd Party SIP
SIP SLT Signaling 5070 UDP
SIP SLT Voice 10020~10083 UDP
NEC Proprietary SIP (SIP MLT)
SIP MLT Signaling 5080 and 5081 UDP
SIP MLT Voice 10020~10083 UDP
ISSUE 1.0 SL2100
Networking Manual 6-21
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