12-15-2017 01:17 AM - edited 03-08-2019 01:07 PM
Hello,
We've a cisco Nexus9000 NXOS: version 7.0(3)I4(4). Some servers need to send L2 mcast packets to flood between themselfes. I've noticed that "Optimised Multicast Flood (OMF)" is blocking multicast flooding between servers. So i need to disable this security feature. But the question how ?
IGMP Snooping information for vlan 1320 IGMP snooping enabled Lookup mode: IP Optimised Multicast Flood (OMF) enabled
Some configuration guides says that it can be disabled in global or in vlan configuration view, but i dont see that option:
NXOS (config)# no ip igmp snooping ? <CR> event-history Configure event-history buffers group-timeout Configures group membership timeout in all VLAN/BDs link-local-groups-suppression Configures Global link-local groups suppression max-gq-miss Configure general query miss count mrouter Configures static multicast router interface proxy Configures IGMP snooping proxy report-suppression Configures Global IGMPv1/IGMPv2 Report Suppression v3-report-suppression Configures Global IGMPv3 Report Suppression and Proxy Reporting
NXOS (config-vlan-config)# no i igmp snooping ? <CR> access-group IGMP access-group explicit-tracking Configures Explicit Host tracking for VLAN/BD fast-leave Configures Fast leave for the VLAN/BD group-timeout Configures group membership timeout in VLAN/BD last-member-query-interval Configures interval between group-specific Query transmissions link-local-groups-suppression Configures VLAN/BD link-local groups suppression mrouter Configures static multicast router interface proxy Configures IGMP snooping proxy proxy-leave Proxy Leave querier Enables snooping querier querier-timeout Configures querier timeout for IGMPv2 query-interval Configures interval between query transmission query-max-response-time Configures MRT for query messages report-flood Configures Report flooding on a VLAN report-policy IGMP Report Policy report-suppression Configures IGMPv1/IGMPv2 Report Suppression for the VLAN/BD robustness-variable Configures RFC defined Robustness Variable startup-query-count Configures number of queries sent at startup startup-query-interval Configures query interval at startup static-group Configures static group membership v3-report-suppression Configures IGMPv3 Report Suppression and Proxy Reporting for the VLAN/BD version Configures IGMP version number for VLAN/BD
Any help ?
p.s as a workaround i disabled the IGMP snooping.
Thank you
Solved! Go to Solution.
12-15-2017 07:51 AM
you dont need to disable OMF in N9k, as OMF is not there. its only for N7k due to a hardware limitation. Refer: CSCul57924
12-15-2017 07:51 AM
you dont need to disable OMF in N9k, as OMF is not there. its only for N7k due to a hardware limitation. Refer: CSCul57924
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