> Source: [sk31499](https://support.checkpoint.com/results/sk/sk31499) # sk31499 - How to find out the Multicast MAC Addresses that are associated with Cluster Virtual interfaces | Property | Value | |----------|-------| | Solution ID | sk31499 | | Date Created | 2006-02-09 | | Last Modified | 2018-01-09 | | Technical Level | General | | Products | Security Gateway | | Versions | R82.10, R82, R81.20 | ## Solution By default, Cluster Control Protocol (CCP) works in Multicast mode (for more details, refer to [sk93306 - ATRG: ClusterXL R6x and R7x](http://supportcontent.checkpoint.com/solutions?id=sk93306)). Run the following commands on each cluster member to get the list of the Multicast MAC addresses that were associated with Cluster Virtual interfaces: 1. Start the cluster configuration debug in the background: *Note* : this debug does not consume any CPU resources and does not cause any impact on the performance. **`[Expert@HostName]# fw ctl zdebug -m cluster + conf > /var/log/data.txt &`** 2. Generate the list of the cluster interfaces and their configuration: **`[Expert@HostName]# cphaconf debug_data`** 3. Bring the cluster configuration debug into the foreground: **`[Expert@HostName]# fg`** 4. Stop the debug by pressing CTRL+C. 5. In the output file '`/var/log/data.txt`', look for this section: **`;---- Multicast table ----`** *** ** * ** *** Example of the complete debug output (relevant section appears in bold text): ``` ;24Oct2012 17:52:20.449806;[cpu_0];[fw_0];================================================; ;24Oct2012 17:52:20.449808;[cpu_0];[fw_0];===== ClusterXL debug information ===; ;24Oct2012 17:52:20.449809;[cpu_0];[fw_0];================================================ ; ;24Oct2012 17:52:20.449809;[cpu_0];[fw_0];---- Sync ---- ; ;24Oct2012 17:52:20.449812;[cpu_0];[fw_0];fwlddist_state is (1a): Receiving, Not Saving, Sending; ;24Oct2012 17:52:20.449813;[cpu_0];[fw_0];fwlddist_dobcast is: 1; ;24Oct2012 17:52:20.449814;[cpu_0];[fw_0];fw_has_nondefault_filter is: 1; ;24Oct2012 17:52:20.449814;[cpu_0];[fw_0];fw_syncn_is_configured is: 1; ;24Oct2012 17:52:20.449815;[cpu_0];[fw_0];fwlddist_policy_in_ready_state is: 1; ;24Oct2012 17:52:20.449816;[cpu_0];[fw_0];---- VMAC mode: ---- ; ;24Oct2012 17:52:20.449816;[cpu_0];[fw_0];VMAC: vmac mode is enabled; ;24Oct2012 17:52:20.449817;[cpu_0];[fw_0];VMAC: the vmac of each interface:; ;24Oct2012 17:52:20.449821;[cpu_0];[fw_0];Interface: 1) eth4, vmac: 00:1C:7F:00:42:28; ;24Oct2012 17:52:20.449822;[cpu_0];[fw_0];Interface: 2) eth2, vmac: 00:1C:7F:00:40:28; ;24Oct2012 17:52:20.449824;[cpu_0];[fw_0];Interface: 3) eth3, vmac: 00:1C:7F:00:41:28; ;24Oct2012 17:52:20.449824;[cpu_0];[fw_0];VMAC: priomisc mode interfaces (by the VMAC mechanism) are:; ;24Oct2012 17:52:20.449826;[cpu_0];[fw_0];Interface: 1) eth4, vmac_index=0x42; ;24Oct2012 17:52:20.449826;[cpu_0];[fw_0];Interface: 2) eth2, vmac_index=0x40; ;24Oct2012 17:52:20.449827;[cpu_0];[fw_0];Interface: 3) eth3, vmac_index=0x41; ;24Oct2012 17:52:20.449830;[cpu_0];[fw_0];------------------------ ; ;24Oct2012 17:52:20.449831;[cpu_0];[fw_0];================================================; ;24Oct2012 17:52:20.449831;[cpu_0];[fw_0];===== ClusterXL debug end ===; ;24Oct2012 17:52:20.449832;[cpu_0];[fw_0];================================================ ; ;24Oct2012 17:52:20.449834;[cpu_0];[fw_1];================================================; ;24Oct2012 17:52:20.449835;[cpu_0];[fw_1];===== ClusterXL debug information ===; ;24Oct2012 17:52:20.449835;[cpu_0];[fw_1];================================================ ; ;24Oct2012 17:52:20.449836;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449837;[cpu_0];[fw_1];===== Cluster instance information ===; ;24Oct2012 17:52:20.449837;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449838;[cpu_0];[fw_1];---- Selection table ---- ; ;24Oct2012 17:52:20.449839;[cpu_0];[fw_1];Effective selection table size: 2 ; ;24Oct2012 17:52:20.449841;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449841;[cpu_0];[fw_1];---- Multicast table ---- ; ;24Oct2012 17:52:20.449844;[cpu_0];[fw_1];eth0: Address: 172.30.41.221; ;24Oct2012 17:52:20.449846;[cpu_0];[fw_1];Cluster/default multicast IP: 172.30.0.250, MAC address: 01:00:5E:1E:00:FA; ;24Oct2012 17:52:20.449848;[cpu_0];[fw_1];eth4: Address: 40.40.40.221; ;24Oct2012 17:52:20.449849;[cpu_0];[fw_1];Cluster/default multicast IP: 40.40.40.224, MAC address: 01:00:5E:28:28:E0; ;24Oct2012 17:52:20.449851;[cpu_0];[fw_1];eth2: Address: 20.20.20.221; ;24Oct2012 17:52:20.449852;[cpu_0];[fw_1];Cluster/default multicast IP: 20.20.20.224, MAC address: 01:00:5E:14:14:E0; ;24Oct2012 17:52:20.449854;[cpu_0];[fw_1];eth3: Address: 30.30.30.221; ;24Oct2012 17:52:20.449855;[cpu_0];[fw_1];Cluster/default multicast IP: 30.30.30.224, MAC address: 01:00:5E:1E:1E:E0; ;24Oct2012 17:52:20.449856;[cpu_0];[fw_1];eth1: Address: 10.10.10.221; ;24Oct2012 17:52:20.449858;[cpu_0];[fw_1];Cluster/default multicast IP: 10.10.10.250, MAC address: 01:00:5E:0A:0A:FA; ;24Oct2012 17:52:20.449860;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449861;[cpu_0];[fw_1];---- Status subscribers ---- ; ;24Oct2012 17:52:20.449862;[cpu_0];[fw_1];Subscriber: 0 pid 3307 sig 3 desc cprd PID 3307; ;24Oct2012 17:52:20.449863;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449864;[cpu_0];[fw_1];===== Cluster instance information end ===; ;24Oct2012 17:52:20.449864;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449865;[cpu_0];[fw_1];---- Sync ---- ; ;24Oct2012 17:52:20.449867;[cpu_0];[fw_1];fwlddist_state is (1a): Receiving, Not Saving, Sending; ;24Oct2012 17:52:20.449867;[cpu_0];[fw_1];fwlddist_dobcast is: 1; ;24Oct2012 17:52:20.449868;[cpu_0];[fw_1];fw_has_nondefault_filter is: 1; ;24Oct2012 17:52:20.449869;[cpu_0];[fw_1];fw_syncn_is_configured is: 1; ;24Oct2012 17:52:20.449870;[cpu_0];[fw_1];fwlddist_policy_in_ready_state is: 1; ;24Oct2012 17:52:20.449870;[cpu_0];[fw_1];---- VMAC mode: ---- ; ;24Oct2012 17:52:20.449871;[cpu_0];[fw_1];VMAC: vmac mode is enabled; ;24Oct2012 17:52:20.449872;[cpu_0];[fw_1];VMAC: the vmac of each interface:; ;24Oct2012 17:52:20.449873;[cpu_0];[fw_1];Interface: 1) eth4, vmac: 00:1C:7F:00:42:28; ;24Oct2012 17:52:20.449875;[cpu_0];[fw_1];Interface: 2) eth2, vmac: 00:1C:7F:00:40:28; ;24Oct2012 17:52:20.449876;[cpu_0];[fw_1];Interface: 3) eth3, vmac: 00:1C:7F:00:41:28; ;24Oct2012 17:52:20.449877;[cpu_0];[fw_1];VMAC: priomisc mode interfaces (by the VMAC mechanism) are:; ;24Oct2012 17:52:20.449878;[cpu_0];[fw_1];Interface: 1) eth4, vmac_index=0x42; ;24Oct2012 17:52:20.449878;[cpu_0];[fw_1];Interface: 2) eth2, vmac_index=0x40; ;24Oct2012 17:52:20.449879;[cpu_0];[fw_1];Interface: 3) eth3, vmac_index=0x41; ;24Oct2012 17:52:20.449882;[cpu_0];[fw_1];------------------------ ; ;24Oct2012 17:52:20.449882;[cpu_0];[fw_1];================================================; ;24Oct2012 17:52:20.449883;[cpu_0];[fw_1];===== ClusterXL debug end ===; ;24Oct2012 17:52:20.449884;[cpu_0];[fw_1];================================================ ``` *** ** * ** *** **Related solutions:** * [sk31782 (ClusterXL association between cluster Virtual IP addresses and MAC Addresses)](http://supportcontent.checkpoint.com/solutions?id=sk31782) * [sk50840 (How to enable ClusterXL Virtual MAC (VMAC) mode)](http://supportcontent.checkpoint.com/solutions?id=sk50840) * [sk93306 (ATRG: ClusterXL R6x and R7x)](http://supportcontent.checkpoint.com/solutions?id=sk93306) --- # Agent Instructions This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products. ## Navigating This Knowledge Base - **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt) - **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml) - **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}` - **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content