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 sessionL2TP 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 28С 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....
>[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.
> Покажите show int по всей цепочке.
> Покажите show int по всей цепочке.Многовато получится...
входной маршрутизатор
начало cisco c2911 area 1show 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 outдалее
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 neverначало 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 outдалее c3750 area 1
show system mtu
System MTU size is 1600 bytes
System Jumbo MTU size is 9000 bytes
Routing MTU size is 1600 bytesинтерфейс 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 outисходящий 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 outтранзитный 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 outдалее 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 outмаршрутизатор 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 outвыходной 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 nevershow 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 outвсе, дальше к потребителю
Попробуйте убрать с интерфейсовip 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
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