12-14-2017 01:21 PM - edited 03-08-2019 01:07 PM
Hello,
I've just added new card, transceiver, and the cable to my 2 servers. All connected to 2 stacked 3750. Very simple network 2 10g servers and just PC- no routing etc
Unfortunately it is not working great. I am having problem with the speed.
10gbpsServer<----fiber---->10gbpsServer- speed over 500MB/s -Good between botf servers over fibre
1gbpsPC----RJ45 ----Cisco3750---fiber--->10gbpsServer- speed 110MB/s -OK
1gbpsPC<----RJ45 ----Cisco3750---fiber---10gbpsServer- speed Just 40MB/s -BAD download to PC
but multiple downloads everyone 40MB/s so 8PC x40MB/s
First stat
TenGigabitEthernet2/0/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 6416.8d98.9a9d (bia 6416.8d98.9a9d)
MTU 1546 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-LR
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:40, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 6
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 727000 bits/sec, 403 packets/sec
5 minute output rate 1968000 bits/sec, 505 packets/sec
27466628 packets input, 16318073143 bytes, 0 no buffer
Received 1565 broadcasts (832 multicasts)
0 runts, 3 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 832 multicast, 0 pause input
0 input packets with dribble condition detected
13981705 packets output, 9577820825 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
second stat
TenGigabitEthernet1/0/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 6400.f1cf.bf9d (bia 6400.f1cf.bf9d)
MTU 1546 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-LR
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:02, 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 57000 bits/sec, 1 packets/sec
5 minute output rate 67000 bits/sec, 12 packets/sec
63681572 packets input, 81989423204 bytes, 0 no buffer
Received 5197 broadcasts (3268 multicasts)
0 runts, 49 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 3268 multicast, 0 pause input
0 input packets with dribble condition detected
73067900 packets output, 64970199495 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
This is the config of the switch
transceivers stats are ok
12-15-2017 04:39 AM
wow. No one?
12-15-2017 04:50 AM - edited 12-15-2017 05:01 AM
Hi
Have you verified if the PC's NIC is working as full duplex and speed 1G? The bandwidth for the PC will be around 1G, also the switchports are working in duplex full?
12-15-2017 04:59 AM
Hello
The bottleneck is going from 1gb to 10gb and the return traffic and by the sounds of it, it seems your servers are windowing ( backing off on how much traffic to send) as a result
res
Paul
12-15-2017 06:11 AM
12-15-2017 05:02 AM
12-15-2017 05:22 AM
Correct- gig to 10g, okay, but 10g to gig not okay. can be ram issue but no one is using network. I've tested last night still the same. gig-gig perfect, 10g-10g perfect just10g to 1gig crap. Must be some setting. All setup for full duplex and 1g.
12-15-2017 07:24 AM
12-15-2017 08:10 AM
you're saying classical but I am googling this 4th day and could not find any solution. It is so 'basic' config and I cannot believe it just not working straight from 'the box'. How normally people doing this? What type of switches they use? 10g server and 1g lan clients... no difficulty, so simple setup. Can you recommend something?
12-15-2017 08:41 AM
Hello
No matter what you do you still will have a bottleneck 10gb into 1gb will never get you the same as directly connected 10gb links.
I would also look into your servers also
what type of servers are they -what O/S and application are they running?
res
paul
12-15-2017 08:47 AM
2 servers W2008 R2 and 2016,mainly are share servers, but also running some watch folder compression software- just Windows compatible.
What if I turn qos off? tbh I don't need any vlans, etc. I can use tham just like 'un-manage' plain switches. Will this help?
12-15-2017 09:47 AM
12-15-2017 05:05 PM
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