Example from my lab. .249 is one of the gateways and .252 is mgmt.
Andy
[Expert@CP-MANAGEMENT:0]# tcpdump -n -i eth0 host 172.16.10.249 and tcp port 257
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
08:48:32.572249 IP 172.16.10.249.53113 > 172.16.10.252.set: Flags [P.], seq 2780509983:2780510905, ack 664294655, win 42, options [nop,nop,TS val 672829816 ecr 672806427], length 922
08:48:32.572277 IP 172.16.10.252.set > 172.16.10.249.53113: Flags [.], ack 922, win 174, options [nop,nop,TS val 672834287 ecr 672829816], length 0
08:48:34.717209 IP 172.16.10.249.53113 > 172.16.10.252.set: Flags [P.], seq 922:1244, ack 1, win 42, options [nop,nop,TS val 672831961 ecr 672834287], length 322
08:48:34.717258 IP 172.16.10.252.set > 172.16.10.249.53113: Flags [.], ack 1244, win 174, options [nop,nop,TS val 672836432 ecr 672831961], length 0
08:48:40.719058 IP 172.16.10.249.53113 > 172.16.10.252.set: Flags [P.], seq 1244:1566, ack 1, win 42, options [nop,nop,TS val 672837963 ecr 672836432], length 322
08:48:40.719089 IP 172.16.10.252.set > 172.16.10.249.53113: Flags [.], ack 1566, win 174, options [nop,nop,TS val 672842434 ecr 672837963], length 0
08:48:42.719061 IP 172.16.10.249.53113 > 172.16.10.252.set: Flags [P.], seq 1566:1704, ack 1, win 42, options [nop,nop,TS val 672839963 ecr 672842434], length 138
08:48:42.719091 IP 172.16.10.252.set > 172.16.10.249.53113: Flags [.], ack 1704, win 174, options [nop,nop,TS val 672844434 ecr 672839963], length 0
^C
8 packets captured
8 packets received by filter
0 packets dropped by kernel
[Expert@CP-MANAGEMENT:0]#