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Chapter 8

Security, Timers, and Traffic Engineering in IP Multicast Networks

Traffic Engineering

The following example shows a boundary on VLAN2 connected to an access layer. The boundary shown permits the group range 239.255.0.0 and denies all other streams on the VLAN2 interface.

interface VLAN2 description To Access VLAN 2 ip multicast boundary moh ! ip access-list standard moh remark Permit 239.255, Deny all others permit 239.255.0.0 0.0.255.255 deny any

Figure 8-1 shows a high-level view of how scoped boundaries can be used to restrict traffic to certain areas of the network. The “Allowed Scopes” list the permitted streams at each location.

Figure 8-1

Graphical View of Administrative Scoping Used with Boundaries

HQ campus

M

Corporate network

Allowed scopes IP/TV High-Rate - 239.255.0.0/16 IP/TV Medium-Rate - 239.192.248.0/22 IP/TV Low-Rate - 239.192.244.0/22 Multicast MoH - 239.192.240.0/22

Branch sites

V

Left

Middle

IP WAN

V

Site

BW

Left

768K

Middle

256k

Right

128K

Right

Primary PVC Secondary PVC

V

Allowed scopes IP/TV Medium-Rate - 239.192.248.0/22 IP/TV Low-Rate - 239.192.244.0/22 Multicast MoH - 239.192.240.0/22

Allowed scopes IP/TV Low-Rate - 239.192.244.0/22 Multicast MoH - 239.192.240.0/22

Allowed scopes Multicast MoH - 239.192.240.0/22

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Cisco AVVID Network Infrastructure IP Multicast Design

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