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https://community.cisco.com/t5/other-security-subjects/why-doesnt-ipsec-support-multicast-traffic/td-p/157915
Why doesnt IPSec support multicast traffic? If IPSec is a tunnel, why cant you define multicast traffic in an ACL to be protected? Solved! Go to Solution. Labels: Other Security Topics; 1 person had this problem. I have this problem too. 0 Helpful Reply. 1 ACCEPTED SOLUTION Accepted Solutions ...
https://learningnetwork.cisco.com/thread/95756
Nov 14, 2019 · I read that multicast communication is not possible in site-to-site IPsec VPN hence we go for IPsec VPN with GRE. Why IPsec won't support multicast ? 95756
https://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike-protocols/41940-dmvpn.html
Jan 04, 2006 · GRE tunnels do support transporting IP multicast and broadcast packets to the other end of the GRE tunnel. The GRE tunnel packet is an IP unicast packet, so the GRE packet can be encrypted using IPsec. In this scenario, GRE does the tunneling work and IPsec does the encryption part of supporting the VPN network.
https://networkengineering.stackexchange.com/questions/44774/which-vpn-types-protocols-inherently-support-multicast-traffic
GRE/IPSec VPN Tunnel: 2 Routers (cisco, pfsense, etc) can form a site to site link using this, which will allow multicast traffic. (Is this a site to site router only VPN protocol?) Question: Of the aforementioned VPN tunnel protocols/types, which support multicast traffic inherently, transparently, or …
https://networkengineering.stackexchange.com/questions/41231/how-do-i-forward-multicast-packets-over-ipsec-vpn-tunnel-on-juniper-srx
I have an IPSec site-to-site VPN setup between two SRX300 devices. I am trying to get multicast to travel across. ... As far as i know you cannot run multicast over IPSec. What you need to do is have GRE over IPSec and then put multicast through the GRE. ... Thanks for contributing an answer to Network Engineering Stack Exchange! Please be sure ...
https://community.cisco.com/t5/vpn-and-anyconnect/ipsec-tunnel-and-routing-protocols-support/td-p/2091791
Dec 23, 2012 · Solved: Hi Everyone, I read IPSEC does not support Routing Protocols with Site to Site VPN as they both are Layer4. Does it mean that If Site A has to reach Site B over WAN link we should use Static IP on Site A and Site B Router? In my home Lab
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_vpnips/configuration/xe-3s/sec-sec-for-vpns-w-ipsec-xe-3s-book/sec-ipv6-ipv4-gre.html
Sep 02, 2018 · Security for VPNs with IPsec Configuration Guide, Cisco IOS XE Release 3S-IPv6 over IPv4 GRE Tunnel Protection. ... tunnels sometimes are combined with IPSec, because IPSec does not support IPv6 multicast packets. This function prevents dynamic routing protocols from running successfully over an IPSec VPN network. ... you can encrypt the GRE ...
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