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"L2tpv3 туннель и UDP трафик"	+/–
Сообщение от ullex (ok) on 09-Сен-16, 13:40
Здравствуйте! Коллеги, есть проблема - в имеющейся цепочке cisco2921-ospf-cat3750-ospf-cat3750-ospf-cisco2921 ходит UDP трафик. Ходит он через L2tpv3 туннель, поднятый на с29хх. В итоге столкнулись с тем, что именно UDP пакеты размером менее 1440 байт проходят нормально, остальные  не проходят(на приеме фиксируется потери более 70% пакетов). На cat3750 настойки mtu следующие: System mtu 1600, System jumbo mtu 9000, Routing mtu 1600. На маршрутизаторах mtu на интерфейсах в сторону клиента - 1600, на интерфейсах в сторону cat3750 - 1600, а на Loopback - интерфейсах(которые участвуют в формировании туннеля -  xconnect'ом) - 1514. Замечаний по ip, tcp  и пр. нет. Критичен именно потоковый UDP. К маршрутизации, остальным маршрутизируемым сетям замечаний нет. На сайте cisco и пр. в основном рассматриваются проблемы с GRE-туннелями или PPP-сессиями. На форумах внятного ответа не нашел. L2tpv3 потому что заказчику нужен broadcast, плюс у них своя ip-политика, в итоге это все что можно имеющимся оборудованием. Вот начало туннеля(кусок конфига): ! ! ! pseudowire-class III encapsulation l2tpv3 ip local interface Loopback3 ! interface Loopback3 description L2tunnel ip address 10.11.0.3 255.255.255.255 ! interface GigabitEthernet0/0 description to-cat3750 mtu 1600 ip address 192.168.252.34 255.255.255.252 ip pim sparse-mode ip nat outside ip virtual-reassembly duplex auto speed auto ! interface GigabitEthernet0/2 description L2Tunn mtu 1600 no ip address duplex auto speed auto no keepalive ! ! interface GigabitEthernet0/2.203 encapsulation dot1Q 203 xconnect 10.14.0.7 20203 encapsulation l2tpv3 pw-class III ! ! ! show l2tp tunnel all L2TP Tunnel Information Total tunnels 1 sessions 1 Tunnel id 398059694 is up, remote id is 3185287100, 1 active sessions   Locally initiated tunnel   Tunnel state is established, time since change 01:51:36   Tunnel transport is IP  (115)   Remote tunnel name is core.1     Internet Address 10.14.0.7, port 0   Local tunnel name is 92-c2911     Internet Address 10.11.0.3, port 0   L2TP class for tunnel is l2tp_default_class   Counters, taking last clear into account:     75434150 packets sent, 53517088 received     3171149111 bytes sent, 3901090180 received     Last clearing of counters never   Counters, ignoring last clear:     75434150 packets sent, 53517088 received     3171149111 bytes sent, 3901090180 received   Control Ns 34636, Nr 31699   Local RWS 1024 (default), Remote RWS 1024   Control channel Congestion Control is disabled   Tunnel PMTU checking disabled   Retransmission time 1, max 1 seconds   Unsent queuesize 0, max 0   Resend queuesize 0, max 2   Total resends 51, ZLB ACKs sent 31691   Total out-of-order dropped pkts 0   Total out-of-order reorder pkts 0   Total peer authentication failures 0   Current no session pak queue check 0 of 5   Retransmit time distribution: 0 42 8 0 1 0 0 0 0   Control message authentication is disabled show l2tun session L2TP Session Information Total tunnels 1 sessions 1 LocID      RemID      TunID      Username, Intf/      State  Last Chg Uniq ID                                  Vcid, Circuit 2362115562 4090181120 398059694  20203, Gi0/2.203:203 est    01:53:11 28 С другой стороны, абсолютно аналогично... Ставил в настройках, с обоих сторон, разумеется, pseudowire-class III ip pmtu и ip pmtu max 1600 и ip dfbit Не помогло. Задача стоит передать пакет размером как раз 1500, ну или больше(если есть возможность). Клиент не может(или не хочет) изменять у себя что-либо....
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1. "L2tpv3 туннель и UDP трафик"	+/–
Сообщение от Andrey (??) on 13-Сен-16, 08:52
>[оверквотинг удален] > pseudowire-class III > ip pmtu > и > ip pmtu max 1600 > и > ip dfbit > Не помогло. > Задача стоит передать пакет размером как раз 1500, ну или больше(если есть > возможность). > Клиент не может(или не хочет) изменять у себя что-либо.... Покажите show int по всей цепочке.
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	2. "L2tpv3 туннель и UDP трафик"	+/–
	Сообщение от ullex (ok) on 13-Сен-16, 12:44
	> Покажите show int по всей цепочке. > Покажите show int по всей цепочке. Многовато получится... входной маршрутизатор начало cisco c2911 area 1 show int g 0/2 GigabitEthernet0/2 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is 30e4.dbad.6d12 (bia 30e4.dbad.6d12)   Description: L2Tunn   MTU 1600 bytes, BW 1000000 Kbit/sec, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, media type is RJ45   output flow-control is unsupported, input flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:08, output 00:00:03, output hang never   Last clearing of "show interface" counters 4d00h   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 0 bits/sec, 0 packets/sec   5 minute output rate 0 bits/sec, 1 packets/sec      348917 packets input, 60738463 bytes, 0 no buffer      Received 11588 broadcasts, 0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 11588 multicast, 0 pause input      0 input packets with dribble condition detected      113940 packets output, 13341549 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      11588 unknown protocol drops      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 pause output      0 output buffer failures, 0 output buffers swapped out далее show int g 0/2.203 (в сторону потребителя) GigabitEthernet0/2.203 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is 30e4.dbad.6d12 (bia 30e4.dbad.6d12)   MTU 1600 bytes, BW 1000000 Kbit/sec, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation 802.1Q Virtual LAN, Vlan ID  203.   Keepalive set (10 sec)   ARP type: ARPA, ARP Timeout 04:00:00   Last clearing of "show interface" counters never начало туннеля show int lo 3 Loopback3 is up, line protocol is up   Hardware is Loopback   Description: L2tunnel   Internet address is 10.11.0.3/32   MTU 1514 bytes, BW 8000000 Kbit/sec, DLY 5000 usec,      reliability 255/255, txload 1/255, rxload 0/255   Encapsulation LOOPBACK, loopback not set   Keepalive set (10 sec)   Last input never, output never, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/0 (size/max)   5 minute input rate 0 bits/sec, 0 packets/sec   5 minute output rate 0 bits/sec, 0 packets/sec      0 packets input, 0 bytes, 0 no buffer      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort      0 packets output, 0 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 unknown protocol drops      0 output buffer failures, 0 output buffers swapped out выходной интерфейс маршрутизатора: show int g 0/0 GigabitEthernet0/0 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is 30e4.dbad.6d10 (bia 30e4.dbad.6d10)   Description: cat3750   Internet address is 192.168.252.34/30   MTU 1600 bytes, BW 1000000 Kbit/sec, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive set (10 sec)   Full-duplex, 1000Mb/s, media type is RJ45   output flow-control is unsupported, input flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:00, output 00:00:00, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/3 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 2000 bits/sec, 4 packets/sec   5 minute output rate 12000 bits/sec, 5 packets/sec      365437516 packets input, 2206605592 bytes, 0 no buffer      Received 3097634 broadcasts, 0 runts, 0 giants, 0 throttles      6613 input errors, 0 CRC, 0 frame, 6613 overrun, 0 ignored      0 watchdog, 3097624 multicast, 0 pause input      0 input packets with dribble condition detected      618169933 packets output, 1718299055 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 unknown protocol drops      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 pause output      0 output buffer failures, 0 output buffers swapped out далее c3750 area 1 show system mtu System MTU size is 1600 bytes System Jumbo MTU size is 9000 bytes Routing MTU size is 1600 bytes интерфейс в сторону маршрутизатора show int g 1/0/46 GigabitEthernet1/0/46 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is b8be.bfe4.cd42 (bia b8be.bfe4.cd42)   Description: c2911   Internet address is 192.168.252.33/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive set (10 sec)   Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:04, output 00:00:01, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 12000 bits/sec, 6 packets/sec   5 minute output rate 4000 bits/sec, 6 packets/sec      1616602606 packets input, 2070432497825 bytes, 0 no buffer      Received 4510864 broadcasts (11 IP multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 4510814 multicast, 0 pause input      0 input packets with dribble condition detected      898840653 packets output, 125315319269 bytes, 0 underruns      0 output errors, 0 collisions, 7 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out исходящий интерфейс в сторону сети show int g 1/0/49 GigabitEthernet1/0/49 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is b8be.bfe4.cd44 (bia b8be.bfe4.cd44)   Description: main-fibre   Internet address is 192.168.252.25/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, link type is auto, media type is unsupported   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:00, output 00:00:00, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 711000 bits/sec, 639 packets/sec   5 minute output rate 714000 bits/sec, 632 packets/sec      17799886662 packets input, 3364607960875 bytes, 0 no buffer      Received 714950232 broadcasts (299 IP multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 714950217 multicast, 0 pause input      0 input packets with dribble condition detected      18081704924 packets output, 4497666809808 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out транзитный c3720 area 2 show sys mtu System MTU size is 1600 bytes System Jumbo MTU size is 9000 bytes Routing MTU size is 1600 bytes входной инт show int g 1/0/50 GigabitEthernet1/0/50 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is 64d8.14dd.ce46 (bia 64d8.14dd.ce46)   Description: main-fibre   Internet address is 192.168.252.26/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, link type is auto, media type is unsupported   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:05, output 00:00:08, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 712000 bits/sec, 630 packets/sec   5 minute output rate 709000 bits/sec, 636 packets/sec      6815508972 packets input, 1031691521055 bytes, 0 no buffer      Received 19712848 broadcasts (23 IP multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 19712837 multicast, 0 pause input      0 input packets with dribble condition detected      6584578715 packets output, 997543540736 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out выходной инт. show int g 1/0/49 GigabitEthernet1/0/49 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is 64d8.14dd.ce45 (bia 64d8.14dd.ce45)   Description: main-fibre   Internet address is 192.168.252.22/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, link type is auto, media type is unsupported   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:00, output 00:00:00, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 4267000 bits/sec, 3366 packets/sec   5 minute output rate 3890000 bits/sec, 3361 packets/sec      35260504315 packets input, 4601148229191 bytes, 0 no buffer      Received 114483165 broadcasts (79 IP multicasts)      0 runts, 0 giants, 0 throttles      137 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 114483155 multicast, 0 pause input      0 input packets with dribble condition detected      35156527233 packets output, 4595354668857 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out далее cat3750 area 3 входной интерфейс show int g 1/0/49 GigabitEthernet1/0/49 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is 64d8.14dd.84c5 (bia 64d8.14dd.84c5)   Description: main-fibre   Internet address is 192.168.252.21/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive not set   Full-duplex, 1000Mb/s, link type is auto, media type is unsupported   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:07, output 00:00:01, output hang never   Last clearing of "show interface" counters 1y4w   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 7417000 bits/sec, 3691 packets/sec   5 minute output rate 4271000 bits/sec, 3368 packets/sec      97789041578 packets input, 14849713935046 bytes, 0 no buffer      Received 421544197 broadcasts (2740 IP multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 421544175 multicast, 0 pause input      0 input packets with dribble condition detected      100762695305 packets output, 17730678410557 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out выходной интерфейс show int g 1/0/43 GigabitEthernet1/0/43 is up, line protocol is up (connected)   Hardware is Gigabit Ethernet, address is 64d8.14dd.84c2 (bia 64d8.14dd.84c2)   Description: to-c2921   Internet address is 192.168.252.37/30   MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive set (10 sec)   Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX   input flow-control is off, output flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:00, output 00:00:00, output hang never   Last clearing of "show interface" counters 1y4w   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 1143000 bits/sec, 203 packets/sec   5 minute output rate 4194000 bits/sec, 548 packets/sec      6134174680 packets input, 902348165488 bytes, 0 no buffer      Received 5826685 broadcasts (7 IP multicasts)      0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored      0 watchdog, 5826456 multicast, 0 pause input      0 input packets with dribble condition detected      6993520061 packets output, 3010583920378 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 babbles, 0 late collision, 0 deferred      0 lost carrier, 0 no carrier, 0 PAUSE output      0 output buffer failures, 0 output buffers swapped out маршрутизатор area 3 входной инт. show int g 0/1 GigabitEthernet0/1 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is c471.fea8.8191 (bia c471.fea8.8191)   Description: to-c3750   Internet address is 192.168.252.38/30   MTU 1600 bytes, BW 1000000 Kbit/sec, DLY 10 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation ARPA, loopback not set   Keepalive set (10 sec)   Full-duplex, 1000Mb/s, media type is RJ45   output flow-control is unsupported, input flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 00:00:03, output 00:00:00, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/12710 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 4306000 bits/sec, 553 packets/sec   5 minute output rate 1128000 bits/sec, 203 packets/sec      3289554779 packets input, 317746007 bytes, 0 no buffer      Received 2473413 broadcasts, 0 runts, 0 giants, 0 throttles      5054607 input errors, 0 CRC, 0 frame, 5054607 overrun, 0 ignored      0 watchdog, 2473363 multicast, 0 pause input      0 input packets with dribble condition detected      3287603504 packets output, 2195762002 bytes, 0 underruns      0 output errors, 0 collisions, 1 interface resets      0 unknown protocol drops      0 babbles, 0 late collision, 0 deferred      1 lost carrier, 0 no carrier, 0 pause output      0 output buffer failures, 0 output buffers swapped out окончание туннеля show int lo 4 Loopback4 is up, line protocol is up   Hardware is Loopback   Description: L2tunnel   Internet address is 10.14.0.7/32   MTU 1514 bytes, BW 8000000 Kbit/sec, DLY 5000 usec,      reliability 255/255, txload 1/255, rxload 1/255   Encapsulation LOOPBACK, loopback not set   Keepalive set (10 sec)   Last input never, output never, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/0 (size/max)   5 minute input rate 0 bits/sec, 0 packets/sec   5 minute output rate 0 bits/sec, 0 packets/sec      0 packets input, 0 bytes, 0 no buffer      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort      0 packets output, 0 bytes, 0 underruns      0 output errors, 0 collisions, 0 interface resets      0 unknown protocol drops      0 output buffer failures, 0 output buffers swapped out выходной интерфейс show int g 0/2.203 GigabitEthernet0/2.203 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is c471.fea8.8192 (bia c471.fea8.8192)   Description: L2tun   MTU 1600 bytes, BW 100000 Kbit/sec, DLY 100 usec,      reliability 255/255, txload 10/255, rxload 1/255   Encapsulation 802.1Q Virtual LAN, Vlan ID  203.   Keepalive set (10 sec)   ARP type: ARPA, ARP Timeout 04:00:00   Last clearing of "show interface" counters never show int g 0/2 GigabitEthernet0/2 is up, line protocol is up   Hardware is CN Gigabit Ethernet, address is c471.fea8.8192 (bia c471.fea8.8192)   MTU 1600 bytes, BW 100000 Kbit/sec, DLY 100 usec,      reliability 255/255, txload 10/255, rxload 1/255   Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set   Keepalive not set   Full-duplex, 100Mb/s, media type is RJ45   output flow-control is unsupported, input flow-control is unsupported   ARP type: ARPA, ARP Timeout 04:00:00   Last input 20w1d, output 00:00:00, output hang never   Last clearing of "show interface" counters never   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0   Queueing strategy: fifo   Output queue: 0/40 (size/max)   5 minute input rate 1000 bits/sec, 2 packets/sec   5 minute output rate 4103000 bits/sec, 363 packets/sec      1608706588 packets input, 676636949 bytes, 0 no buffer      Received 43 broadcasts, 0 runts, 0 giants, 0 throttles      1144468873 input errors, 0 CRC, 0 frame, 1144468873 overrun, 0 ignored      0 watchdog, 37 multicast, 0 pause input      0 input packets with dribble condition detected      1556471707 packets output, 667676332 bytes, 0 underruns      0 output errors, 0 collisions, 2 interface resets      16 unknown protocol drops      0 babbles, 0 late collision, 0 deferred      2 lost carrier, 0 no carrier, 0 pause output      0 output buffer failures, 0 output buffers swapped out все, дальше к потребителю
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	3. "L2tpv3 туннель и UDP трафик"	+/–
	Сообщение от fantom (??) on 19-Сен-16, 09:36
	Попробуйте убрать с интерфейсов ip virtual-reassembly >[оверквотинг удален] >      1556471707 packets output, 667676332 bytes, 0 underruns >      0 output errors, 0 collisions, 2 interface > resets >      16 unknown protocol drops >      0 babbles, 0 late collision, 0 deferred >      2 lost carrier, 0 no carrier, 0 > pause output >      0 output buffer failures, 0 output buffers > swapped out > все, дальше к потребителю
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	4. "L2tpv3 туннель и UDP трафик"	+/–
	Сообщение от ullex (ok) on 25-Сен-16, 08:59
	ip virtual-reassembly добавляется автоматически при включении NAT на интерфейсе. К тому же часть канала проходит через каталисты c3750, а там размер Routing MTU не может быть более 1600... Судя по-всему в данной реализации транспорта или с данными железками ни чего не поделать... >[оверквотинг удален] >>      1556471707 packets output, 667676332 bytes, 0 underruns >>      0 output errors, 0 collisions, 2 interface >> resets >>      16 unknown protocol drops >>      0 babbles, 0 late collision, 0 deferred >>      2 lost carrier, 0 no carrier, 0 >> pause output >>      0 output buffer failures, 0 output buffers >> swapped out >> все, дальше к потребителю
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