Sample Scenario Of H-Vpls On Acx Series Routers For Iptv Services; Sample Configuration Scenario Of H-Vpls For Iptv Services - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide
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Sample Scenario of H-VPLS on ACX Series Routers for IPTV Services

Sample Configuration Scenario of H-VPLS for IPTV Services

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To view the details of the ECMP next hops and to obtain information for debugging any
problem with the ECMP functionality, issue the
command.
The maximum number of next-hop addresses in an ECMP set that can be installed in
the forwarding table of ACX Series routers is 16. A maximum of 2047 ECMP next-hops
are supported.
Understanding Routing Policies
Summary of Routing Policy Actions
Hierarchical LDP-based VPLS requires a full mesh of tunnel LSPs between all the PE
routers that participate in the VPLS service. For each VPLS service, n*(n-1)/2 pseudowires
must be set up between the PE routers. Although the full mesh requirement creates
signaling overhead, the larger negative impact to large-scale deployment is the packet
replication requirements for each provisioned pseudowire on a PE router. Using hierarchical
connectivity reduces signaling and replication overhead to facilitate large-scale
deployments. .
In a typical IPTV solution, IPTV sources are in the public domain and the subscribers are
in the private VPN domain. The objective is to deliver the multicast streams originated
from the IPTV source to the set-top boxes or subscribers in the private domain. Generally,
for an efficient delivery of multicast data from the IP Sources to the access devices (ACX
in this case), P2MP LSPs and mVPN is used. The subscriber devices could then be
connected to a VPLS or a Layer 3 VPN domain in Access router and they could be
configured to import the multicast routes from an MVPN instance. Because VPLS and
MVPN are not supported on ACX routers, an alternative approach can be used to achieve
H-VPLS capabilities. The support for PIM snooping in Layer 3 interfaces, IGMP snooping
in Layer 2 networks, IRB interfaces, and logical tunnel interfaces enables HVLS support.
An ACX router receives the multicast data on the default VRP context and the data gets
forwarded on to the BD through IRB and gets replicated on the BD ports based on the
membership detected through IGMP snooping. Unicast control traffic between Subscriber
devices and the IPTV subscriber management server goes through the private VPN
domain. Aggregation routers have VPLS full-mesh connectivity between each other and
ACX works as H-VPLS MTU. There is a PW setup between ACX and the aggregation
router. LT interface does the stitching of the Bridge domain with the PW
Consider a scenario in which set-top boxes (STBs) or customer premises equipment
(CPE) devices are connected to two ACX routers, ACX1 and ACX2. On the ACX routers,
a global virtual routing and forwarding (VRF) context, bridge domains, pseudowires, and
IRB settings are defined. ACX1 is connected to two MX Series routers, MX2 and MX3.
Connection to ACX1 to MX2 is through an active pseudowire with PIM deployed. PIM is
used as the transport protocol in communication between ACX and MX routers. Unicast
transmission is also configured. Connection of ACX1 to MX3 is through a backup
or the
show route show route summary
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