How Do I?Part 1 IP Connectivity - Page 85
LAN
When using an indirectly connected WAN or VPN router these devices should be capable of handling marked traffic at a priority to ensure prompt handling of voice traffic. Alternatively, over supplying the available bandwidth will ensure that all packets, voice and data, are handled quickly.
The VPN Line should be used to set the maximum number of simultaneous voice call and the System/Gatekeeper tab (see page 37) should be used to specify the DSCP (TOS or Diffserv) value for the VoIP traffic type.
See Configure VPN Line on page 99 and QoS over WAN between IPNC & 3rd Party Router on page 88 for details.
LAN – with VPN ROUTERS
This application example is suitable for VoIP between Site 1 and Site 2. All inter- site traffic is handled and routed by the VPN router. When using an indirectly connected slow speed link, all routers should be capable of handling marked traffic at a priority to ensure prompt handling of voice traffic.
Voice packets transmitted by the IPNC have the DSCP field marked to indicate it's priority (Diffserv).
Site 1 | Site 2 |
INDeX 1 | INDeX 2 | ||
192.168.42.1 |
| 192.168.124.1 | |
192.168.42.100 | 192.168.124.100 |
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PC_1 |
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VPN | VPN | ||
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Router#1 | Router#2 |
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192.168.42.10 |
| 192.168.124.19 | |
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| Step 1 |
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| The IPNC will always present itself as the default router when |
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| Configure PC_1 and PC_2 networking |
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| allocating IP parameters via the DHCP. For this reason the |
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| Site 1 |
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| DHCP server option should not be used as the IPNC is not |
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| • | IP Address | = | 192.168.42.10 |
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| the default router for the networks in this application example. |
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| • | IP Mask | = | 255.255.255.0 |
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| • | Gateway | = | 192.168.42.100 |
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| Site 2 |
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| • | IP Address | = | 192.168.124.19 |
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| • | IP Mask | = | 255.255.255.0 |
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| • | Gateway | = | 192.168.124.100 |
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INDeX IPNC Cassette Administration Manual | How Do I? - Page 85 |
38DHB0002UKDD – Issue 7 (22/11/02) | Part 1 IP Connectivity |
