Router gond?

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Sziasztok!

Egy Mercury routeren keresztül csatlakozok a netre (ADSL). Az utóbbi pár napban különös netforgalomra lettem figyelmes.
Itt a tcpdump kimenete:
[code:1:ca43f1da72]tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
15:49:06.555056 IP 192.168.1.1.1929 > 239.255.255.250.1900: UDP, length 260
15:49:06.555842 IP 192.168.1.1.1929 > 239.255.255.250.1900: UDP, length 278
15:49:06.556659 IP 192.168.1.1.1929 > 239.255.255.250.1900: UDP, length 332
15:49:06.559752 IP 192.168.1.1.1930 > 239.255.255.250.1900: UDP, length 324
15:49:06.563143 IP 192.168.1.1.1931 > 239.255.255.250.1900: UDP, length 254
15:49:06.563982 IP 192.168.1.1.1931 > 239.255.255.250.1900: UDP, length 296
15:49:06.567085 IP 192.168.1.1.1932 > 239.255.255.250.1900: UDP, length 328
15:49:06.570466 IP 192.168.1.1.1933 > 239.255.255.250.1900: UDP, length 274
15:49:06.571294 IP 192.168.1.1.1933 > 239.255.255.250.1900: UDP, length 326
15:49:06.575179 IP 192.168.1.1.1934 > 239.255.255.250.1900: UDP, length 320
15:49:06.588253 IP darkstar.slackware.32777 > 192.168.1.1.domain: 3708+ PTR? 250.255.255.239.in-addr.arpa. (46)
15:49:06.607603 arp who-has darkstar.slackware tell 192.168.1.1
15:49:06.607634 arp reply darkstar.slackware is-at 00:50:8d:6c:70:b2 (oui Unknown)
15:49:06.607946 IP 192.168.1.1.domain > darkstar.slackware.32777: 3708 NXDomain 0/1/0 (103)
15:49:06.608219 IP darkstar.slackware.32777 > 192.168.1.1.domain: 10733+ PTR? 1.1.168.192.in-addr.arpa. (42)
15:49:06.627194 IP 192.168.1.1.domain > darkstar.slackware.32777: 10733 NXDomain* 0/1/0 (92)
15:49:11.607740 arp who-has 192.168.1.1 tell darkstar.slackware
15:49:11.608057 arp reply 192.168.1.1 is-at 00:40:f4:ac:ea:2f (oui Unknown)
15:49:16.777261 IP 192.168.1.1.1937 > 239.255.255.250.1900: UDP, length 260
15:49:16.778099 IP 192.168.1.1.1937 > 239.255.255.250.1900: UDP, length 278
15:49:16.778920 IP 192.168.1.1.1937 > 239.255.255.250.1900: UDP, length 332
15:49:16.782034 IP 192.168.1.1.1938 > 239.255.255.250.1900: UDP, length 324
15:49:16.785464 IP 192.168.1.1.1939 > 239.255.255.250.1900: UDP, length 254
15:49:16.786306 IP 192.168.1.1.1939 > 239.255.255.250.1900: UDP, length 296
15:49:16.789402 IP 192.168.1.1.1940 > 239.255.255.250.1900: UDP, length 328
15:49:16.792762 IP 192.168.1.1.1941 > 239.255.255.250.1900: UDP, length 274
15:49:16.793601 IP 192.168.1.1.1941 > 239.255.255.250.1900: UDP, length 326
15:49:16.797531 IP 192.168.1.1.1942 > 239.255.255.250.1900: UDP, length 320
15:49:26.999539 IP 192.168.1.1.1943 > 239.255.255.250.1900: UDP, length 260
15:49:27.000379 IP 192.168.1.1.1943 > 239.255.255.250.1900: UDP, length 278
15:49:27.001204 IP 192.168.1.1.1943 > 239.255.255.250.1900: UDP, length 332
15:49:27.004306 IP 192.168.1.1.1944 > 239.255.255.250.1900: UDP, length 324
15:49:27.007759 IP 192.168.1.1.1945 > 239.255.255.250.1900: UDP, length 254
15:49:27.008596 IP 192.168.1.1.1945 > 239.255.255.250.1900: UDP, length 296
15:49:27.011693 IP 192.168.1.1.1946 > 239.255.255.250.1900: UDP, length 328
15:49:27.015046 IP 192.168.1.1.1947 > 239.255.255.250.1900: UDP, length 274
15:49:27.015883 IP 192.168.1.1.1947 > 239.255.255.250.1900: UDP, length 326
15:49:27.019769 IP 192.168.1.1.1948 > 239.255.255.250.1900: UDP, length 320

38 packets captured
76 packets received by filter
0 packets dropped by kernel
[/code:1:ca43f1da72]
Mellesleg windows alatt is ugyanez a helyzet. Pl Medal of Honor-al nem is tudok játszani, mert annyira laggel.
Ha jól értelmezem a tcpdump kimenetét, akkor a 239.255.255.250-es IP-t próbálja a router elérni, de miért?

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