03-14-2013 06:07 AM - edited 03-04-2019 07:17 PM
Hello,
Need some help to figure out the bandwidth usage for the WAN router f2/0 interface, sending you what we have from this interface
30 second input rate 881000 bits/sec, 296 packets/sec
30 second output rate 395000 bits/sec, 292 packets/sec
1297322378 packets input, 1616261346 bytes
Received 59127 broadcasts, 0 runts, 0 giants, 0 throttles
Thank you
Solved! Go to Solution.
03-14-2013 08:12 AM
If you want to validate the speed of the link transmit and receive at the time you take the sample, you should only check the following lines:
30 second input rate 2952000 bits / sec, 555 packets / sec
30 second output rate 479000 bits / sec, 470 packets / sec
Here you should not add or subtract anything. As I mentioned earlier in a FastEthernet link in full duplex mode, the transmission is independent (30 seconds output rate) incoming (30 seconds input rate).
These statistics are based on bits per second as this is handled in terms of transmission in data networks.
For the snapshot you send you:
30 second input rate 2952000 bits / sec, 555 packets / sec
30 second output rate 479000 bits / sec, 470 packets / sec
That is for you reception: 2952000 bits / sec,
so if you want to refer this value in kilobits divide by 1000 and you have:
2952000/1000 = 2952 kbps
if you want to refer this value in megabits divide between 1000000 and have:
2952000/1000000 = 2.952 Mbps
Importantly, as the point referring transmission rates in data networks (x Gbps Mbps x, x Kbps, x bps) that are expressed in terms of bits, as opposed to storage that is expressed in terms of Bytes (Gbytes, Mbytes, Kbytes, bytes). It is also important to note that the second character of the velocity:
xbps = second character is "b" in lower case that which be interpreted as bits. "x" or first character can be G, g, M,m,K,k, or not exist if the rate is expressed in bits.
There are statistical tools that add these two values:
Input Ouput rate + rate to generate a total, but personally I'm not decuerdo with this and usually do not use this type of graph. Prefer separate or overlapping graphs.
Important
There are statistical tools that add these two values:
Input Ouput rate + rate to generate a total, but personally I'm not decuerdo with this and usually do not use this type of graph. Prefer separate or overlapping graphs.
03-14-2013 06:38 AM
The following document can review useful information, specifically reviewing Table 41:
http://www.cisco.com/en/US/docs/ios/12_2/interface/command/reference/irfshoin.html#wp1018148
03-14-2013 06:54 AM
If you want to verify traffic flows that are going through that interface, you can configure NetFlow TopTalkers.
In the following link you can get valuable information:
As a summary only need to configure the following commands:
ip flow-top-talkers (global configuration mode)
and in interface configuration mode:
!
FastEthernet0/1.884 interface
ip flow ingress and / or egress ip flow
After you verify with a "show ip flow top-talkers":
MBO-RT-03 # sh ip flow top-talkers
Pr DstIPaddress SrcIPaddress SrcIf DstIf SRCP DSTP Bytes
Fa0/1.884 Fa0/0.4 23.15.5.213 1xx.xxx.xx.123 0050 06 081F 1906K
Fa0/1.884 Fa0/0.4 23.15.5.206 1xx.xxx.xx.123 0050 0E85 06 1306K
100 of 100 Shown top talkers. 538 flows processed.
MBO-RT-03 #
If the information is helpful, please rate me.
03-14-2013 06:54 AM
Hello,
Thanks for the link and something we need to review in the future, can you help us figure out how much bandwidth we are using based on what I'm sending you, what we have left, we are having a speed issues on our external WAN router that requires fixing. we either need to add more bandwidth or a new circuit, not able to move forward until we know the speed on that interface, can you help with this.
Thank you
03-14-2013 07:00 AM
I'm sending you the show int f2/0 and from what is shown can you tell us are we using 1.3Mbps or 3.2 Mbps or something else.
astEthernet2/0 is up, line protocol is up
Hardware is AmdFE, address is 000b.46c5.7431 (bia 000b.46c5.7431)
Description: To Internal Office From UUNET
Internet address is 208.251.158.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 7/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:10, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/203/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 2751000 bits/sec, 519 packets/sec
30 second output rate 458000 bits/sec, 445 packets/sec
1311366632 packets input, 1596377767 bytes
Received 59947 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
1319276459 packets output, 3238626875 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
1260 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
thank you
03-14-2013 07:14 AM
This interface is FastEthernet, operating in full duplex mode at speeds which has 2 fully independent
- One of Outbound. Refers to outbound traffic for the router interface to the remote end of the link. This statistic is: 30 second output rate 458000 bits / sec, 445 packets / sec, ie 458kbps.
- One of Incoming. Refers to traffic from the remote end of the link. This statistic is: 30 second input rate 2751000 bits / sec, 519 packets / sec, ie 2Mbps.
Importantly, this is relative to the time since sampling is recorded or calculated every 30 seconds.
03-14-2013 07:07 AM
As I understand, you have a WAN link, which you receive in a ethernet port but do not know the bandwidth that you are actually delivering?
And service degradation think you might be reaching the limit of the BW?
You can monitor the link via SNMP with a tool you have to do, if you have not I recommend SolarWinds Real-Time Bandwidth Monitor, the tool that you can download for free and trial. There you can get almost real upper limit of what the provider will deliver, of course this depends on other varibles. What kind of service do you have? Is internet? Synchronous or asynchronous? O is a point to point link?
You can also contact the service provider to let you know the characteristics of the service and so you can compare with the graphs you get via SNMP.
03-14-2013 07:15 AM
I'm sorry - hate to be rude, we do not have snmp setup as this is a security issue,
We need to figure out the math for what I'm sending to show much bandwidth we are currently using on that interface, same interface all traffic is going through - yes the MFR circuits at times is hitting the top of the threshold we have set with Verizon.
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/203/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 1716000 bits/sec, 464 packets/sec
30 second output rate 512000 bits/sec, 437 packets/sec
1312073261 packets input, 1952867772 bytes
Received 59972 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
1319934024 packets output, 3358607387 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
1260 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
thanks
03-14-2013 07:34 AM
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
According to what I understand, you have a bottleneck on the provider connection. Your contract is for X bandwidth with MFR (multilink frame relay?), No matter however much the technology used but the actual bandwidth of the link, as the receive connection with a FastEthernet link you have configured with default bandwidth parameter of 100 Mbps
For the above have an asynchronous link: link router (100 Mbps) --- Service Provider (Kbps X), where X is less than 100 Mbps when ecenarios have said you should consider two suggestions:
1) Set the Bandwidth parameter within the FastEthernet interface with the real value contracted in the link, so that the statistics will be more useful in a show interface, I mean counters: Txload and rxload.
2) You must configure Traffic Policing or Shaping Traffic to avoid congesting the link hired, as this will directly affect the performance of your application or service used through the link.
Additionally I suggest that you check the network cable plugged into that port because it reflects a high number of carrier loss.
03-14-2013 07:47 AM
It is important to note that the settings of Traffic Policing or Traffic Shaping is required, if you want to avoid congestion problems on the link.
03-14-2013 07:19 AM
You can use some software like PRTG to monitor your bandwith usage.
03-14-2013 07:46 AM
I'm sorry - must be typing something wrong, sent the information for Cisco 3640 router for interface f2/0 - trying to figure out total bandwidth usage - can someone tell me how to figure out what math to use for figuring this out, are adding something? What numbers, subtraction? What numbers, or any other, how do we figure out the total without other software
30 second input rate 2952000 bits/sec, 555 packets/sec
30 second output rate 479000 bits/sec, 470 packets/sec
1312637298 packets input, 2245078841 bytes
Received 59991 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
1320457549 packets output, 3456948494 bytes, 0 underruns
thanks
03-14-2013 08:12 AM
If you want to validate the speed of the link transmit and receive at the time you take the sample, you should only check the following lines:
30 second input rate 2952000 bits / sec, 555 packets / sec
30 second output rate 479000 bits / sec, 470 packets / sec
Here you should not add or subtract anything. As I mentioned earlier in a FastEthernet link in full duplex mode, the transmission is independent (30 seconds output rate) incoming (30 seconds input rate).
These statistics are based on bits per second as this is handled in terms of transmission in data networks.
For the snapshot you send you:
30 second input rate 2952000 bits / sec, 555 packets / sec
30 second output rate 479000 bits / sec, 470 packets / sec
That is for you reception: 2952000 bits / sec,
so if you want to refer this value in kilobits divide by 1000 and you have:
2952000/1000 = 2952 kbps
if you want to refer this value in megabits divide between 1000000 and have:
2952000/1000000 = 2.952 Mbps
Importantly, as the point referring transmission rates in data networks (x Gbps Mbps x, x Kbps, x bps) that are expressed in terms of bits, as opposed to storage that is expressed in terms of Bytes (Gbytes, Mbytes, Kbytes, bytes). It is also important to note that the second character of the velocity:
xbps = second character is "b" in lower case that which be interpreted as bits. "x" or first character can be G, g, M,m,K,k, or not exist if the rate is expressed in bits.
There are statistical tools that add these two values:
Input Ouput rate + rate to generate a total, but personally I'm not decuerdo with this and usually do not use this type of graph. Prefer separate or overlapping graphs.
Important
There are statistical tools that add these two values:
Input Ouput rate + rate to generate a total, but personally I'm not decuerdo with this and usually do not use this type of graph. Prefer separate or overlapping graphs.
03-14-2013 08:21 AM
on these two lines:
1312637298 packets input, 2245078841 bytes
1320457549 packets output, 3456948494 bytes
Are variable with cumulative values, these variables are cleared or set to 0 to reach a limit. Here it should be noted that the values are expressed in bytes that is amount of data transmitted and received data amount, since the last time the counters were cleared (this can be for a reboot or administratively counters were cleared) or reset limit value may reflect the specific counter.
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