Administrace komentářů

tracepath dopadne takhle:

[root@server ~]# tracepath -n /za_modemem/
 1:  xxx.xxx.xxx.xxx   0.161ms pmtu 1500
 1:  xxx.xxx.xxx.xxx   0.866ms 
 1:  xxx.xxx.xxx.xxx   0.792ms 
 2:  xxx.xxx.xxx.xxx   5.250ms 
 3:  xxx.xxx.xxx.xxx   1.551ms 
 4:  xxx.xxx.xxx.xxx   1.620ms pmtu 1472
 4:  /modem/         268.024ms 
 5:  /za_modemem/     31.419ms reached
     Resume: pmtu 1472 hops 5 back 60 

[root@za_modemem ~]# tracepath -n /server/
 1?: [LOCALHOST]     pmtu 1500
 1:  /modem/           5.504ms 
 1:  /modem/           3.000ms 
 2:  /modem/           2.020ms pmtu 1414
 2:  no reply
 3:  no reply
 4:  no reply
 5:  no reply
 6:  no reply
 7:  no reply
 8:  no reply
 9:  no reply
10:  no reply
11:  /server/         40.301ms reached
     Resume: pmtu 1414 hops 11 back 5 

Ping projde:

[root@proxy ~]# ping -c 1 -M do -s 1400 /za_modemem/
PING /za_modemem/ (/za_modemem/) 1400(1428) bytes of data.
1408 bytes from /za_modemem/: icmp_seq=1 ttl=60 time=259 ms

--- /za_modemem/ ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 259ms
rtt min/avg/max/mdev = 259.837/259.837/259.837/0.000 ms

Pokud se tyka iperfu, tak alespon u tech UDP datagramu, se kterymi to zkousim, DF nenastavuje. Navic skutecne bere v potaz velikost zadanou parametrem -l na prikazove radce. Datagramy, ktere pak generuje, vypadaji takhle:

Frame 38: 1242 bytes on wire (9936 bits), 300 bytes captured (2400 bits)
Internet Protocol Version 4, Src: /za_modemem/ (/za_modemem/), Dst: /server/ (/server/)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
    Total Length: 1228
    Identification: 0xc490 (50320)
    Flags: 0x00
        0... .... = Reserved bit: Not set
        .0.. .... = Don't fragment: Not set
        ..0. .... = More fragments: Not set
    Fragment offset: 0
    Time to live: 64
    Protocol: UDP (17)
    Header checksum: 0xd366 [validation disabled]
    Source: /za_modemem/ (/za_modemem/)
    Destination: /server/ (/server/)
User Datagram Protocol, Src Port: 62251 (62251), Dst Port: targus-getdata1 (5201)
Data (258 bytes)

Pral bych si, aby to byl problem s MTU. Sice bych si pripadal trapne, ze jsem na to neprisel, protoze to take byla prvni vec, co me napadla a kterou jsem se snazil vyloucit, ale i tak bych to bral