[GTER] problemas com BGP

Alexandre J. Correa - Onda Internet alexandre at onda.psi.br
Thu Jul 3 06:55:26 -03 2008


Caros, bom dia !

Notei que os acessos a determinados lugares esta bastante estranho, 
predendo pacotes, as vezes 100%, saindo com meu cidr perdia, mas saindo 
com cidr da operadora nao perdia.

utilizando meu cidr:

maresia# ping -S 189.84.0.4 www.uol.com.br
PING www.uol.com.br (200.98.249.120): 56 data bytes
64 bytes from 200.98.249.120: icmp_seq=8 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=9 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=10 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=17 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=38 ttl=50 time=26.987 ms
^C
--- www.uol.com.br ping statistics ---
61 packets transmitted, 5 packets received, 91% packet loss
round-trip min/avg/max/stddev = 26.987/30.186/30.986/1.600 ms

utilizando o cidr da operadora:

maresia# ping -S 200.243.251.133 www.uol.com.br
PING www.uol.com.br (200.98.249.120) from 200.243.251.133: 56 data bytes
64 bytes from 200.98.249.120: icmp_seq=0 ttl=53 time=31.572 ms
64 bytes from 200.98.249.120: icmp_seq=1 ttl=53 time=30.985 ms
64 bytes from 200.98.249.120: icmp_seq=2 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=3 ttl=53 time=29.983 ms
64 bytes from 200.98.249.120: icmp_seq=4 ttl=53 time=30.986 ms
64 bytes from 200.98.249.120: icmp_seq=5 ttl=53 time=29.985 ms
64 bytes from 200.98.249.120: icmp_seq=6 ttl=53 time=29.984 ms
64 bytes from 200.98.249.120: icmp_seq=7 ttl=53 time=29.988 ms
^C
--- www.uol.com.br ping statistics ---
8 packets transmitted, 8 packets received, 0% packet loss
round-trip min/avg/max/stddev = 29.983/30.559/31.572/0.601 ms



maresia# ping -S 189.84.0.4 www.terra.com.br
PING www.terra.com.br (200.176.3.142): 56 data bytes
^C
--- www.terra.com.br ping statistics ---
21 packets transmitted, 0 packets received, 100% packet loss

maresia# ping -S 200.243.251.133 www.terra.com.br
PING www.terra.com.br (200.176.3.142) from 200.243.251.133: 56 data bytes
64 bytes from 200.176.3.142: icmp_seq=1 ttl=244 time=57.983 ms
64 bytes from 200.176.3.142: icmp_seq=2 ttl=244 time=57.985 ms
64 bytes from 200.176.3.142: icmp_seq=3 ttl=244 time=57.987 ms
64 bytes from 200.176.3.142: icmp_seq=4 ttl=244 time=57.987 ms
64 bytes from 200.176.3.142: icmp_seq=5 ttl=244 time=57.986 ms
64 bytes from 200.176.3.142: icmp_seq=6 ttl=244 time=57.988 ms
64 bytes from 200.176.3.142: icmp_seq=7 ttl=244 time=57.979 ms
64 bytes from 200.176.3.142: icmp_seq=8 ttl=244 time=57.986 ms
64 bytes from 200.176.3.142: icmp_seq=9 ttl=244 time=58.986 ms
^C
--- www.terra.com.br ping statistics ---
10 packets transmitted, 9 packets received, 10% packet loss
round-trip min/avg/max/stddev = 57.979/58.096/58.986/0.315 ms
maresia#



Onda-CRT-04#sh ip bgp neighbors 200.251.xx.xx advertised-routes
BGP table version is 106143, local router ID is 189.84.SS.SS
Status codes: s suppressed, d damped, h history, * valid, > best, i - 
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
*> 189.84.0.0/20    0.0.0.0                  0         32768 i


ha algum outro teste que possa ser feito para tentar achar o que esta 
acontecendo ?


Obrigado !!

-- 
Sds.

Alexandre Jeronimo Correa

Onda Internet - http://www.ondainternet.com.br
OPinguim Hosting - http://www.opinguim.net

Linux User ID #142329

UNOTEL S/A - http://www.unotel.com.br







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