[rootbmb]

Добрый день!! Помогите пожалуйста с решение такой проблемы.

Схема такая vpn-server--mikrotik(ccr1036)--snr-s2990-(клиенты), потеря больших пакетов в pptp-тунели если маршрутизатором является микротик(ccr1036) как указанно в схеме.

 

mikrotik cc1036

 

br-vlan10(vlan10sp1,vlan10e1)-192.168.41.128/26-br-vlan10 это бридж

br-vpn(vpn1bond,vpn2bond)-10.0.0.8/24 - br-vpn это бридж

 

 

vpn

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
TCPMSS     tcp  --  0.0.0.0/0            0.0.0.0/0            tcpflags: 0x06/0x02 TCPMSS clamp to PMTU

 

accel-ppp

ppp917    Link encap:Point-to-Point Protocol  
         inet addr:1.1.1.1  P-t-P:176.113.124.31  Mask:255.255.255.255
         UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1400  Metric:1
         RX packets:325177 errors:0 dropped:0 overruns:0 frame:0
         TX packets:751564 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:3 
         RX bytes:30601081 (30.6 MB)  TX bytes:1004083010 (1.0 GB)

 

tcpdump

00:00:00.000014 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.965512 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1973, length 1376
00:00:00.000189 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035128 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1973, length 1376
00:00:00.000017 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.965657 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1974, length 1376
00:00:00.000004 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035258 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1974, length 1376
00:00:00.000014 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.966156 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1975, length 1376
00:00:00.000006 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035063 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1975, length 1376
00:00:00.000014 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.966271 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:01.004818 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1977, length 1376
00:00:00.000003 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035313 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1977, length 1376
00:00:00.000012 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.966458 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1978, length 1376
00:00:00.000007 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:01.007870 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:01.004964 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1980, length 1376
00:00:00.000003 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035124 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1980, length 1376
00:00:00.000008 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.966789 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1981, length 1376
00:00:00.000005 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035276 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1981, length 1376
00:00:00.000013 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.966255 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1982, length 1376
00:00:00.000226 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035386 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1982, length 1376
00:00:00.000013 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.965469 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:01.005661 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1984, length 1376
00:00:00.000004 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035013 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1984, length 1376
00:00:00.000013 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.965976 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1985, length 1376
00:00:00.000008 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035391 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1985, length 1376
00:00:00.000016 IP 93.158.134.3 > 176.113.124.31: icmp
00:00:00.965823 IP 176.113.124.31 > 93.158.134.3: ICMP echo request, id 3226, seq 1986, length 1376
00:00:00.000004 IP 176.113.124.31 > 93.158.134.3: icmp
00:00:00.035382 IP 93.158.134.3 > 176.113.124.31: ICMP echo reply, id 3226, seq 1986, length 1376
00:00:00.000008 IP 93.158.134.3 > 176.113.124.31: icmp

 

Проверял без микротика потерь нет, а вот при использование микротика начинаются потери.

[zero00]

mtu уменьшайте до 1360 например

[rootbmb]

mtu меня не помогало

[rootbmb]

не ужели ни кто не сталкивался с этой проблемой ???

[rdntw]

вам в другой раздел