>А на транке между G и H ошибки есть?

вот статистика интерфейса - вроде нет

Cat@XX#show interface GigabitEthernet0/25
GigabitEthernet0/25 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is XXXX.XXXX.XXXX (bia XXXX.XXXX.XXXX)
  Description: optic to NH1
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 12/255, rxload 57/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLX SFP
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:22, output 00:00:23, 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 224746000 bits/sec, 30231 packets/sec
  5 minute output rate 48028000 bits/sec, 23207 packets/sec
     699983888 packets input, 669269158879 bytes, 0 no buffer
     Received 3133053 broadcasts (3012083 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 3012083 multicast, 0 pause input
     0 input packets with dribble condition detected
     501809695 packets output, 124892610641 bytes, 0 underruns
     0 output errors, 0 collisions, 1 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

Mejdu svitchami E i G ispolzuetsa perexodnik s 10gb na 1 gb (TwinGig) mojet li eto bit prichinoy? Sheypa nigde net i kanal zagrijen vsego na 60 procentov (580Mb)