In our LAN we have several keepalived clasters (used different virtual_router_id of course) - all operating on multicast. The issue is that before installing and running keepalived on particular host I cannot sniff vrrp traffic by tcpdump:
- when I started keepalived - I see ALL vrrp multicast of this LAN
- when I stopped keepalived - tcpdump shows nothing in vrrp
Already checked firewalld, iptabels and sysctl net.ipv4.ip_nonlocal_bind - everything is OK. OS - RHEL 8.0
The need to see vrrp traffic before running keepalived is because we want to generate unique virtual_router_id before installing and running keepalived by checking what ids are already taken.
