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check_1_1_sp_comms

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check_1_1_sp_comms [2021/04/08 16:50] – created walkeradmincheck_1_1_sp_comms [2023/03/09 22:35] (current) – external edit 127.0.0.1
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-Check 1+1 SP Comms+====== Check 1+1 SP Comms ====== 
 +<color darkorange>Apr 2021</color> 
 + 
 +---- 
 +==== Introduction ==== 
 +\\  
 +The 1+1 SPs communicate with each other over the Management network using various ports, these are: 
 +<file> 
 +15771 for Mux comms 
 + 
 +15772 for Simulcrypt 
 + 
 +15778 for stat Mux 
 +</file> 
 +\\  
 +We can use tcpdump to monitor the traffic between the Muxes by specifying the relevant port. 
 +\\  
 +    tcpdump -i mngt port 15778 -Q out 
 +\\  
 +This will show Stat Mux traffic (as in the stat mux control messages). 
 +\\  
 +\\  
 +The active Mux will show something like below: 
 +<file> 
 +tcpdump -i eth0 port 15778 -Q out 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +15:49:22.309719 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:22.851978 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:23.394021 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:23.936007 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:24.478037 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:25.019993 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:25.562039 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:26.104193 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:26.646276 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +15:49:27.188263 IP sp01.15778 > 235.2.127.254.15778: UDP, length 61 
 +</file> 
 +\\  
 +Where as the inactive mux will have no tcpdump output 
 +\\  
 +<file> 
 +tcpdump -i eth0 port 15778 -Q out 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +</file> 
 +\\  
 +If we look at the Mux Comms on 15771 then we see activity from BOTH Muxes: 
 +<file> 
 +On the Main Mux 
 + 
 +tcpdump -i eth0 port 15771 -Q out 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +15:58:10.290160 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:10.790638 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:11.290752 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:11.791356 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:12.291375 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:12.791417 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:13.291816 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:13.792613 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:14.293486 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +15:58:14.793887 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +</file> 
 +\\  
 +<file> 
 +On the Backup Mux 
 + 
 +tcpdump -i eth0 port 15771 -Q out 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +15:58:10.255915 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:10.756223 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:11.256603 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:11.756856 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:12.257007 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:12.757740 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:13.258254 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:13.758822 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:14.259383 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +15:58:14.760368 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +</file> 
 +\\  
 +Unfortunately both outputs look the same, but if we add -A to the command line, so: 
 +\\  
 +\\  
 +tcpdump -i eth0 port 15771 -Q out -A 
 +\\  
 +\\  
 +We see the following: 
 +\\  
 +<file> 
 +From the MAIN Mux 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +16:02:20.064957 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +E....6@.@..W........=.=....]{ 
 +    "uid": "SP01", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895607872, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": true, 
 +        "transmitting": true 
 +    }, 
 +    "cc": 134 
 +} 
 + 
 +16:02:20.565987 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +E....]@.@..0........=.=....]{ 
 +    "uid": "SP01", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895607872, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": true, 
 +        "transmitting": true 
 +    }, 
 +    "cc": 135 
 +} 
 + 
 +16:02:21.066788 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +E... .@.@...........=.=....]{ 
 +    "uid": "SP01", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895607872, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": true, 
 +        "transmitting": true 
 +    }, 
 +    "cc": 136 
 +} 
 + 
 +16:02:21.566860 IP sp01.15771 > 235.2.127.254.15771: UDP, length 207 
 +E...!.@.@...........=.=....]{ 
 +    "uid": "SP01", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895607872, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": true, 
 +        "transmitting": true 
 +    }, 
 +    "cc": 137 
 +} 
 +</file> 
 +\\  
 +<file> 
 +From the BACKUP Mux 
 + 
 +tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
 +listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 
 +16:02:20.027155 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +E...j"@.@..h........=.=....`{ 
 +    "uid": "SP02", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895627134, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": false, 
 +        "transmitting": false 
 +    }, 
 +    "cc": 135 
 +} 
 + 
 +16:02:20.527548 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +E...j.@.@...........=.=....`{ 
 +    "uid": "SP02", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895627134, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": false, 
 +        "transmitting": false 
 +    }, 
 +    "cc": 136 
 +} 
 + 
 +16:02:21.028483 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +E...k.@.@...........=.=....`{ 
 +    "uid": "SP02", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895627134, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": false, 
 +        "transmitting": false 
 +    }, 
 +    "cc": 137 
 +} 
 + 
 +16:02:21.528890 IP sp02.15771 > 235.2.127.254.15771: UDP, length 209 
 +E...mZ@.@..0........=.=....`{ 
 +    "uid": "SP02", 
 +    "groupName": "mux_mux_52_1_1", 
 +    "startTime": 1617895627134, 
 +    "removed": false, 
 +    "privateData": { 
 +        "oldest": false, 
 +        "transmitting": false 
 +    }, 
 +    "cc": 138 
 +} 
 +</file>
check_1_1_sp_comms.1617897023.txt.gz · Last modified: 2023/03/09 22:35 (external edit)