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linux系统在运行route命令时,显示结果很慢,tcpdump抓包如下.dns服务器(192.168.0.17)能正常使用.不知道是何原因???
00:02:09.364872 IP (tos 0x0, ttl 64, id 58455, offset 0, flags [DF], proto: UDP (17), length: 72) 192.168.0.19.33030 > 192.168.0.17.domain: [bad udp cksum baf0!] 50864+ PTR? 254.0.168.192.in-addr.arpa. (44)
00:02:10.358636 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 72) 192.168.0.17.domain > 192.168.0.19.33026: [udp sum ok] 64795 ServFail q: PTR? 254.0.168.192.in-addr.arpa. 0/0/0 (44)
00:02:10.358659 IP (tos 0xc0, ttl 64, id 11457, offset 0, flags [none], proto: ICMP (1), length: 100) 192.168.0.19 > 192.168.0.17: ICMP 192.168.0.19 udp port 33026 unreachable, length 80
IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 72) 192.168.0.17.domain > 192.168.0.19.33026: 64795 ServFail q:[|domain]
00:02:10.358665 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 72) 192.168.0.17.domain > 192.168.0.19.33030: [udp sum ok] 50864 ServFail q: PTR? 254.0.168.192.in-addr.arpa. 0/0/0 (44)
00:02:15.352738 IP (tos 0x0, ttl 64, id 64443, offset 0, flags [DF], proto: UDP (17), length: 72) 192.168.0.19.33030 > 192.168.0.17.domain: [bad udp cksum baf0!] 50864+ PTR? 254.0.168.192.in-addr.arpa. (44)
00:02:17.841561 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 71) 192.168.0.17.domain > 192.168.0.19.33029: [udp sum ok] 52598 ServFail q: PTR? 21.0.168.192.in-addr.arpa. 0/0/0 (43)
00:02:17.841570 IP (tos 0xc0, ttl 64, id 11458, offset 0, flags [none], proto: ICMP (1), length: 99) 192.168.0.19 > 192.168.0.17: ICMP 192.168.0.19 udp port 33029 unreachable, length 79
IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 71) 192.168.0.17.domain > 192.168.0.19.33029: 52598 ServFail q:[|domain]
00:02:22.841462 arp who-has 192.168.0.19 tell 192.168.0.17
00:02:22.841470 arp reply 192.168.0.19 is-at 00:1d:09:65:3a:e7 (oui Unknown) |
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