Limitations
These are the limitations for MCT peers to support intermediate router functionality. These limitations are due to load-sharing and fast
convergence trade-offs.
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PIM-DM is not supported.
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Few packets may be lost during convergence interval or forwarding duplication may happen.
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MCT client will do flow based load-sharing, not per packet load-sharing.
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Traffic loss or duplication will happen when Keep-Alive VLAN, Cluster Communication Protocol (CCP) ,or ICL between MCT
peers are not up.
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Multicast routing configurations on session VLAN is not supported and restricted in configuration.
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The load will only be shared, and may or may not be balanced across the CCEPs.
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During the convergence interval, a few packets may be lost. In the case of recoveries, some packets may end up being
forwarded by both cluster routers during interval.
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Both the MCT peers maintain state and pull down traffic for all multicast flows from the core, whether the chassis is forwarding
this stream to the local CCEP or not. This could potentially waste the bandwidth inside the core and on uplink.
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You can configure both MCT peers to do either PIM routing or multicast snooping in MCT VLANs. However, configuring one
MCT peer to do PIM routing and the other to do multicast snooping in the same MCT VLAN is not supported.
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PIM neighbor on CEP in an MCT VLAN is not supported if the MCT cluster is running PIM on the same MCT VLAN.
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First-hop routing (FHR) and "Last-hop routing (LHR) are not supported on MCT clusters on MCT VLAN interfaces.
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Rendezvous points (RP) are not supported on MCT clusters.
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MSDP and Anycast-RP are not supported on MCT clusters.
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This feature is not supported on non default VRFs.
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IPv6 multicast routing on MCT is not supported on MCT clusters.
Configuring multicast routing over MCT
Follow these steps to configure multicast routing over MCT.
1. Configure an MCT cluster.
2. Configure an MCT member VLAN.
3. Configure multicast routing (PIM) over MCT member VE.
Layer 3 behavior with MCT
FastIron Ethernet Switch Layer 3 Routing
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