[Kea-users] client throttling possible?

Rudy R. crapsh at monkeybrains.net
Sun Apr 19 01:52:40 UTC 2020


Hi Kea users,

I am switching from ISC to KEA and am seeing something an -PD request -- 
odd in that is coming in at about 20,000 times per minute.

I'm getting a lot of these in my log file:

2020-04-18 18:41:12.268 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x977984: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.268 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0x2b73d3: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.268 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x2b73d3: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.269 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0x3d003e: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.269 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x3d003e: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.270 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0xe5854e: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.271 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0xe5854e: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.271 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0x2f3f52: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.271 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x2f3f52: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.273 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0x617615: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.274 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x617615: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.275 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0x41364b: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.275 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0x41364b: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised
2020-04-18 18:41:12.276 INFO  [kea-dhcp6.leases/8350] DHCP6_LEASE_ADVERT 
duid=[00:03:00:01:14:cc:20:37:d2:6f], tid=0xb8f29b: lease for address 
2607:f598:b6d0:228:0:a:0:17 and iaid=0 will be advertised
2020-04-18 18:41:12.276 INFO  [kea-dhcp6.leases/8350] 
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:14:cc:20:37:d2:6f], 
tid=0xb8f29b: lease for prefix 2607:f598:b6da:170::/60 and iaid=1 will 
be advertised


Here is my config:

   {
    "subnet": "2607:F598:B6d0:228::/64",
    "pools": [ { "pool": "2607:F598:B6d0:228::a:0:0/96" } ],
    "pd-pools":
    [
     { "prefix": "2607:F598:B6da::", "prefix-len": 48, "delegated-len": 
60 },
     { "prefix": "2607:F598:B6db::", "prefix-len": 48, "delegated-len": 
64 },
     { "prefix": "2607:F598:B6dc::", "prefix-len": 48, "delegated-len": 56 }
    ]
   },


Looks like a TP-LINK router...


Is (root at kea) 162> kea-show-leases6.sh
IPAddr                              HWAddr              Lease 
Start           Renew           Expire          Hostname  State
[...snip...]
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183840 20200418T191200 20200418T194520 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183840 20200418T191200 20200418T194520 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183837 20200418T191157 20200418T194517 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183837 20200418T191157 20200418T194517 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183837 20200418T191157 20200418T194517 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183836 20200418T191156 20200418T194516 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183835 20200418T191155 20200418T194515 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183831 20200418T191151 20200418T194511 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183831 20200418T191151 20200418T194511 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183828 20200418T191148 20200418T194508 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183827 20200418T191147 20200418T194507 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183825 20200418T191145 20200418T194505 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183824 20200418T191144 20200418T194504 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183824 20200418T191144 20200418T194504 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183824 20200418T191144 20200418T194504 .         0
2607:f598:b6d0:228:0:a:0:17/128     14:cc:20:37:d2:6f    4000 
20200418T183823 20200418T191143 20200418T194503 .         0



Can I limit a client to 1 request per 10 seconds or something like that?


Rudy




More information about the Kea-users mailing list