02-17-2012 08:58 PM - edited 03-07-2019 05:01 AM
Hi Guys.
We are using 2 Nexus 5010 switches and 10 N2248TP fex in our network. From last couple of days we are facing slowness of speed while transferring the data between servers of same vlan and other vlan also. we just upgraded the NX-OS of the N5K, from 4.2 to 5.0. I also check the reliability at both ends N5K and core switch end. Reliabilty at N5K is 255, but at 6500 end it is varying.
One of my friend also suggest to me capture the traffic on the port of N5K using packet sniffer but as far as i know it only support from port number 1 to 8 of N5K, but due to some problem we are not able to do that.
As you all know the ports are gig interfaces, I also checked the traffic on interfaces and it is showing in KBs, which is I think normal.
Please help me to get this resolve.
Let me know if you need more information.
02-17-2012 10:16 PM
Hi Rahul,
Please check if any of the uplink port might be operating at half-duplex.
For less reliability, do you see any interface errors?
You can also try changing the physical cable at 6500 end.
Is the CPU utilization ok ?
Regards,
Manjunath
02-18-2012 12:42 AM
Hi Manju
I checked the interface errors and it looks fine means there are less
interface errors. And I also check he cpu utilization at n5k end and it
also looks good.
But when I check the transceivers details on which the FEX are connected it
shows the low rx power which is near about -14 to -19 which should be below
-9 (i think).
On Sat, Feb 18, 2012 at 11:46 AM, manju.cisco <
02-18-2012 08:27 AM
If the reliability is less than 255 I would concentrate your efforts there. Usually it will end up being a link issue of some type . On the 6500 it means the input side is having issues if reliability is less than 255 . Do a "show int count errors" on the 6500 and see if you have any kind of errors on that port.
02-18-2012 10:38 AM
Hi Glen
I Checked these things in our network
N5k-02# show interface po 20
port-channel20 is up
...
TX
790490271 unicast packets 1087642360 multicast packets 68156043 broadcast packets
1951188058 output packets 1165629908843 bytes
561388059 jumbo packets
4899384 output errors 0 collision 0 deferred 0 late collision
...
N5k-02# show interface po 20
port-channel20 is up
...
TX
790490271 unicast packets 1087642360 multicast packets 68156043 broadcast packets
1951188058 output packets 1165629908843 bytes
561388059 jumbo packets
4899384 output errors 0 collision 0 deferred 0 late collision
...
N5k-02# show interface po 21
port-channel21 is up
...
TX
175617896 unicast packets 1089368787 multicast packets 72209289 broadcast packets
1340485189 output packets 411976690403 bytes
95206895 jumbo packets
3289217 output errors 0 collision 0 deferred 0 late collision
...
N5k-02# show interface po 1
port-channel1 is up
RX
17811453216 unicast packets 197999631 multicast packets 21806634 broadcast packets
18124651262 input packets 10301861996607 bytes
4163629941 jumbo packets 0 storm suppression packets
0 giants 93391716 input error 0 short frame 0 overrun 0 underrun
...
TX
23777606752 unicast packets 979391112 multicast packets 50653545 broadcast packets
24827147262 output packets 21363197421163 bytes
10892515864 jumbo packets
19495853 output errors 0 collision 0 deferred 0 late collision
...
N5k-01# show interface po 1
...
RX
23777513880 unicast packets 979405024 multicast packets 50653907 broadcast packets
24827691239 input packets 21363864658141 bytes
10892910708 jumbo packets 0 storm suppression packets
0 giants 20118413 input error 0 short frame 0 overrun 0 underrun
...
TX
17908407199 unicast packets 198972933 multicast packets 21836545 broadcast packets
18129253476 output packets 10303612322248 bytes
4164246244 jumbo packets
36799 output errors 0 collision 0 deferred 0 late collision
...
N5k-01# show inter e1/15 transceiver detail
Ethernet1/15
transceiver is present
type is 10Gbase-SR
name is CISCO-FINISAR
part number is FTLX8571D3BCL-CS
revision is E
serial number is FNS143800D2
nominal bitrate is 10300 MBit/sec
Link length supported for 50/125um fiber is 80 m
Link length supported for 50/125um fiber is 300 m
Link length supported for 62.5/125um fiber is 20 m
cisco id is --
cisco extended id number is 4
Transceiver Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 42.38 C 75.00 C -5.00 C 70.00 C 0.00 C
Voltage 3.29 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 8.31 mA 11.80 mA 4.00 mA 10.80 mA 5.00 mA
Tx Power -2.20 dBm 1.69 dBm -11.30 dBm -1.30 dBm -7.30 dBm
Rx Power -11.19 dBm -- 1.99 dBm -13.97 dBm -1.00 dBm -9.91 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
Please let me know what you get from this.
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