Difference between revisions of "IPv6 Debugging: Contoh untuk tcpdump paket dump"
Onnowpurbo (talk | contribs) |
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¬ 255) | ¬ 255) | ||
| − | ===Neighbor discovery solicitation | + | ===Neighbor discovery solicitation untuk mencari for host atau gateway=== |
| − | Node | + | Node ingin mengirim paket ke “2001:0db8:0:1::10” tapi tidak punya layer 2 MAC address untuk mengirimkan paket, oleh karenanya mengirimkan solicitation |
13:07:47.664538 2002:0102:0304:1:2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: | 13:07:47.664538 2002:0102:0304:1:2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: | ||
| Line 54: | Line 54: | ||
¬ hlim 255) | ¬ hlim 255) | ||
| − | Node | + | Node mencari “fe80::10” |
13:11:20.870070 fe80::2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: neighbor | 13:11:20.870070 fe80::2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: neighbor | ||
¬ sol: who has fe80::10(src lladdr: 0:e0:18:90:92:5) (len 32, hlim 255) | ¬ sol: who has fe80::10(src lladdr: 0:e0:18:90:92:5) (len 32, hlim 255) | ||
Revision as of 09:41, 9 July 2013
Berikut adalah beberapa contoh hasil capture paket, barangkali akan bermanfaat saat melakukan debugging.
Menemukan (discovery) Router
Router advertisement
15:43:49.484751 fe80::212:34ff:fe12:3450 > ff02::1: icmp6: router ¬ advertisement(chlim=64, router_ltime=30, reachable_time=0, ¬ retrans_time=0)(prefix info: AR valid_ltime=30, preffered_ltime=20, ¬ prefix=2002:0102:0304:1::/64)(prefix info: LAR valid_ltime=2592000, ¬ preffered_ltime=604800, prefix=2001:0db8:0:1::/64)(src lladdr: ¬ 0:12:34:12:34:50) (len 88, hlim 255)
Router dengan link-local address “fe80::212:34ff:fe12:3450” mengirimkan advertisement ke all-node-on-link multicast address “ff02::1” berisi dua prefix “2002:0102:0304:1::/64” (lifetime 30 detik) dan “2001:0db8:0:1::/64” (lifetime 2592000 detik) termasuk including 2 MAC address-nya “0:12:34:12:34:50”.
Router solicitation
15:44:21.152646 fe80::212:34ff:fe12:3456 > ff02::2: icmp6: router solicitation ¬ (src lladdr: 0:12:34:12:34:56) (len 16, hlim 255)
Node dengan link-local address “fe80::212:34ff:fe12:3456” dan layer 2 MAC address “0:12:34:12:34:56” sedang mencari router on-link, oleh karenanya mengirimkan solicitation ke all-router-on-link multicast address “ff02::2”.
Penemuan (discovery) Neighbor
Neighbor discovery solicitation for duplicate address detection
Following packets are sent by a node with layer 2 MAC address “0:12:34:12:34:56” during autoconfiguration to check whether a potential address is already used by another node on the link sending this to the solicited-node link-local multicast address.
Node wants to configure its link-local address “fe80::212:34ff:fe12:3456”, checks for duplicate now
15:44:17.712338 :: > ff02::1:ff12:3456: icmp6: neighbor sol: who has ¬ fe80::212:34ff:fe12:3456(src lladdr: 0:12:34:12:34:56) (len 32, hlim 255)
Node wants to configure its global address “2002:0102:0304:1:212:34ff:fe12:3456” (after receiving advertisement shown above), checks for duplicate now
15:44:21.905596 :: > ff02::1:ff12:3456: icmp6: neighbor sol: who has ¬ 2002:0102:0304:1:212:34ff:fe12:3456(src lladdr: 0:12:34:12:34:56) (len 32, ¬ hlim 255)
Node wants to configure its global address “2001:0db8:0:1:212:34ff:fe12:3456” (after receiving advertisement shown above), checks for duplicate now
15:44:22.304028 :: > ff02::1:ff12:3456: icmp6: neighbor sol: who has ¬ 2001:0db8:0:1:212:34ff:fe12:3456(src lladdr: 0:12:34:12:34:56) (len 32, hlim ¬ 255)
Neighbor discovery solicitation untuk mencari for host atau gateway
Node ingin mengirim paket ke “2001:0db8:0:1::10” tapi tidak punya layer 2 MAC address untuk mengirimkan paket, oleh karenanya mengirimkan solicitation
13:07:47.664538 2002:0102:0304:1:2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: ¬ neighbor sol: who has 2001:0db8:0:1::10(src lladdr: 0:e0:18:90:92:5) (len 32, ¬ hlim 255)
Node mencari “fe80::10”
13:11:20.870070 fe80::2e0:18ff:fe90:9205 > ff02::1:ff00:10: icmp6: neighbor ¬ sol: who has fe80::10(src lladdr: 0:e0:18:90:92:5) (len 32, hlim 255)