WebIn reference to: Note that "Switch > Switch Settings" Page, shows that both "IGMP Snooping" and "Flood unknown multicast traffic" Options are enabled. This makes the network vulnerable to Multicast and broadcast storms. You should disable one of these options. 6 8 comments Add a Comment VA_Network_Nerd • 3 yr. ago WebIf you want to shut down multicasts on an interface completely, use storm-control multicast level 0 switchport block multicast The first command prevents inbound multicasts from entering the switchport. The second stops outbound multicasts from getting out. Share Improve this answer Follow answered Apr 8, 2010 at 20:46 Paul 779 1 9 18 Add a comment
UNDERSTANDING SWITCHPORT BLOCK UNICAST/MULTICAST …
WebSep 25, 2024 · Enable multicast firewalling under the Virtual Wire configuration: Multicast traffic transiting through the firewall can now be blocked, by either blocking the entire global multicast IP address … WebApr 8, 2024 · With multicast traffic, the port blocking feature blocks only pure Layer 2 packets. Multicast packets that contain IPv4 or IPv6 information in the header are not blocked. How to Configure Port Blocking. Blocking Flooded Traffic on an Interface Before you begin. The interface can be a physical interface or an EtherChannel group. ... indiana weather 10 day forecast
UNDERSTANDING SWITCHPORT BLOCK …
WebJul 27, 2024 · To guarantee that no unicast and multicast traffic is flooded to the port, use the switchport block unicast and switchport block multicast commands to enable flood blocking on the switch. link: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12 … Web1 day ago · I've strugled with this for few days now, turned off firewall(no help), checkd that rp_filter won't block(are there other settings within kernel which would block?), added multicast route to specific interface(no effect). System which I'm using is Centos 9 Stream(kernel 5.14.0-295.el9.x86_64), Python 3.9.16 WebJan 22, 2024 · Let say in above scenario, you want to block multicast traffic sourced from 181.1.2.201 then you can do that by doing below. Below config will block multicast traffic from 181.1.2.201 but allow anything else . ip access-list extended acc_grp13 deny ip host 181.1.2.201 any permit ip any any! interface gigabitethernet 2/3/0 indiana weather forecast 7-day