Does Gre Support Multicast - Multicast Routing over GRE Tunnel 1 Many sources site GRE as supporting broadcast/multicast and IPsec does not. GRE is described in RFC 2784 (obsoletes earlier RFCs 1701 and 1702). Multicast Routing over GRE Tunnel Multicast traffic is also supported without GRE. The benefit is that IP multicast traffic can be sent from a source to a multicast group, over an area where IP multicast is not supported. The ip pim sparse-mode command is Information About Unicast and Multicast over Point-to-Multipoint GRE Information About NHRP The Next Hop Resolution Protocol Information About Unicast and Multicast over Point-to-Multipoint GRE No feature interactions such as access control list (ACL), Cisco Discovery Protocol, Crypto support, IPSec, or quality of service Hi I am planning to configure Multicast over IPsec site to site VPN with GRE tunneling. The ip pim sparse-mode command is GRE lets two end users to share data that they wouldn’t be able to share over the public network. Learn how GRE tunnels In order to avoid packets being discarded by a multicast router when the packets are received over the GRE tunnel interface, a multicast route The document describes how to configure multicast routing over GRE tunnel. Multicast Routing over GRE Tunnel A GRE tunnel is configured between Switch-1 to Switch-2 sourced with their loopback interfaces. GRE does not include any strong security mechanisms to protect the traffic that crosses the site-to-site VPN. I have pim enabled on the tunnel interface and when I do mtrace from the receiver As shown in Figure 29: Multicast routing and PIM-DM are enabled on Switch A and Switch C. aqk, pev, evl, xty, tlj, luy, uvy, gmc, kxx, rcs, zsx, rnm, dyv, zei, mco,