300-515 · Question #131
Refer to the exhibit. A network engineer is implementing MLDP on router PE1 as shown to support routing and forwarding of multicast packets for multiple VRFs. The network design requires each PE…
The correct answer is A. mdt preference mldp. To fully enable MLDP for a VPNv4 multicast service, you must configure both the default MDT (which builds the shared MP2MP tree) and the data MDT (which carries the customer’s multicast streams). The correct commands under the VRF look like this: PE1(config-vrf)# mdt preference…
Question
Refer to the exhibit. A network engineer is implementing MLDP on router PE1 as shown to support routing and forwarding of multicast packets for multiple VRFs. The network design requires each PE router to join the MP2MP tree and receive traffic on MP2MP trees. Which additional command sequence must the engineer apply to PE1 to complete the configuration?
Exhibit
Options
- Amdt preference mldp
- Bip vrf VRF
- Cvpn id 70:50
- Dmdt data mpls mldp 255
How the community answered
(32 responses)- A59% (19)
- B13% (4)
- C22% (7)
- D6% (2)
Explanation
To fully enable MLDP for a VPNv4 multicast service, you must configure both the default MDT (which builds the shared MP2MP tree) and the data MDT (which carries the customer’s multicast streams). The correct commands under the VRF look like this: PE1(config-vrf)# mdt preference mldp PE1(config-vrf)# mdt default mpls mldp 192.168.20.1 PE1(config-vrf)# mdt data mpls mldp 255 PE1(config-vrf)# mdt data threshold 20 list 1 mdt preference mldp tells the router to use mLDP for MD-trees. mdt default mpls mldp 192.168.20.1 joins the MP2MP control tree (using the specified RP or mdt data mpls mldp 255 defines the data-MDT for all groups (you can tailor the group range with an ACL or list). mdt data threshold 20 list 1 binds that data-MDT to a particular multicast group list (ACL 1) with a 20 kbps threshold. This completes the MLDP setup so PE1 both joins the shared tree and carries the actual multicast streams for the VRF.
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