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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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Application Scenarios for PBR

Application Scenarios for PBR

Local PBR

As shown in Figure 12-2, RouterA connects to the Internet using two links. To apply PBR to packets that are generated on RouterA, configure local PBR.
Figure 12-2 Networking diagram of local PBR

Interface PBR

As shown in Figure 12-3, the intranet connects to the Internet using RouterA. RouterA has two outbound interfaces connected to the Internet. To enable packets of a specified type to be forwarded through a specified outbound interface, configure interface PBR.
Figure 12-3 Networking diagram of interface PBR

  • Routing based on source addresses: Network administrators can use interface PBR to ensure that VIP users use the link with a higher rate and other users use the link with a lower rate. Interface PBR is configured on RouterA to define routing rules and actions. For example, interface PBR is enabled on Interface3. The interface PBR allows RouterA to send all packets that are received on Interface3 from PC1 at 10.10.10.1/24 through Interface2 and send other packets based on their destination addresses.
  • Routing based on service classes: Different services have different requirements for the transmission rate, throughput, and reliability. Interface PBR allows routers to route data packets based on service classes and network status. For example, routers use high-bandwidth links to transmit voice and video services and low-bandwidth links to transmit data services. Assume that the bandwidth of the link for sending packets from Interface1 is higher than that from Interface2. Interface PBR can be configured on Interface3 of RouterA to enable RouterA to send voice and video services from Interface1 and data services from Interface2.

SPR

As shown in Figure 12-4, an enterprise branch connects to the enterprise data center over two ISP networks (ISP1 and ISP2), and a 3G outbound interface is configured on RouterA to provide a best-effort link. RouterA connects to ISP1 through the link group group1 and connects to ISP2 through the link group group2. ISP1 provides advanced network service at a high cost, while ISP2 provides common network service at a low cost. The enterprise branch exchanges voice, video, FTP and HTTP services with the data center. Voice and video services require high link quality. Therefore, group1 and group2 function as the active and standby link groups respectively for voice and video services. FTP and HTTP services do not require high link quality. Therefore, group2 and group1 function as the active and standby link groups respectively for FTP and HTTP services.
Figure 12-4 Networking diagram of SPR

SPR processes voice and video services as follows:
  • When link quality provided by group1 cannot meet voice and video service requirements but link quality provided by group2 does, SPR switches voice and video services to group2 after the flapping suppression timer expires.
    • If group1 meets service requirements again, SPR switches services back to group1 after the flapping suppression timer expires and a switchover period elapses.
    • If both group 1 and group2 cannot meet service requirements later but group1 provides better link quality than group2, SPR switches services back to group1 after the flapping suppression timer expires and a switchover period elapses.
    • If group2 cannot meet service requirements later but provides better link quality than group1, SPR continues to use group2 to transmit services.
  • When the link quality provided by group1 and group 2 cannot meet voice and video service requirements but their links are available, SPR selects the link with the largest CMI value from group1 and group2 to transmit services.
  • When all the links in group1 and group2 are unavailable, SPR uses the 3G best-effort link to transmit services.
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Updated: 2019-05-20

Document ID: EDOC1100034072

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