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Bandwidth

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15 replies

by cudmasters los

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How can i tell how much bandwidth i am using. I use a Cisco 1811, i do not use telnet, i use the Cisco Configuration Proffesional. Is there a way in the router to see, or another, also, is calling my isp the only way to find out how much bandwith i have available?

Thanks

15 replies

by netwrk_admn

Look into Netflow, which stores statistics about traffic.

There are speed tests on the internet you can use, but they may not be 100% accurate.

by whofsckingcares

Netflow, using ntop to monitor is a good tool; MRTG is, at least for this one application, probably better. It does an SNMP query periodically to pull utilization straight from the router and will show you hourly, daily, weekly and yearly utilization. Plugins can give you total utilization and 95th %ile statistics if those interest you. We monitor all of our routers, internal and Internet, with MRTG and it's really invaluable.
http://oss.oetiker.ch/mrtg/

by oldwise

Most of providers offer some kind of statistics... if you know where to find it. Another solution would be using a program like NetFlow, NetStats etc.

by cudmasters los

They told me it was 15 mb/s up and 2 down. I am trying to figure out how to use the QoS feature in my Cisco 1811 using the CCP. My network seems to be going down everyday around 9:30, would like to view the statistics. the QoS is asking for kbps. Would that be 15,000?

Thanks

by cg it

if you need specific services to have a set priority for traffic. For instance your eCommerce site must always have a higher priority than any other traffic, you then set specific amounts of traffic that the eCommerce site always is allowed. Other traffic then must wait or use a lessor amount.

As others mention, netflow is a great tool to analyze traffic to find out what is causing excessive traffic over and above allowed traffic that causes a slow down.

by cudmasters los

That sound like exactly what i want to do. Netflo as well.

Here's another question. 40 computers, all use same gateway, all same dns, all dhcp, but we'll say half get ping responce from yahoo at 32ms and the other 90-130ms, any idea's?. to give a better sinario, at one spot 3 computers(next to each other, using 4 port gig switch), no programs running,one pings 32 and the other 90-130, both new Dell optiplex 360's.

Thanks

by cg it

it's possible that this isn't your problem rather latency with the next hop router because your pinging yahoo. Your ping request has to go through someone elses routers [ISP more likely] and they have latency. Do a tracert and find out how many routers your ICMP packet has to travel through to get to Yahoo. That might explain the latency.

If you have little latency on the LAN but more so on the WAN, then it's probably not really your problem or equipment.

by cudmasters los

Reply from 209.191.122.70: bytes=32 time=101ms TTL=49
Reply from 209.191.122.70: bytes=32 time=66ms TTL=49
Reply from 209.191.122.70: bytes=32 time=62ms TTL=49
Reply from 209.191.122.70: bytes=32 time=93ms TTL=49

Ping statistics for 209.191.122.70:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 62ms, Maximum = 101ms, Average = 80ms

C:\Documents and Settings\Cuddy>tracert yahoo.com

Tracing route to yahoo.com [209.191.122.70]
over a maximum of 30 hops:

1 12 ms <1 ms <1 ms 10.1.10.1
2 11 ms 7 ms 8 ms 73.147.212.1
3 9 ms 8 ms 8 ms 68.85.73.81
4 16 ms 9 ms 9 ms te-9-2-ur01.eliverpool.oh.pitt.comcast.net [68.8
6.100.17]
5 10 ms 17 ms 9 ms te-8-1-ur01.beaverfalls.pa.pitt.comcast.net [68.
86.100.13]
6 15 ms 11 ms 11 ms te-8-3-ar01.pittsburgh.pa.pitt.comcast.net [68.8
7.173.13]
7 24 ms 25 ms 24 ms te-2-0-0-0-cr01.chicago.il.ibone.comcast.net [68
.86.91.85]
8 25 ms 25 ms 23 ms pos-0-3-0-0-pe01.350ecermak.il.ibone.comcast.net
[68.86.86.158]
9 36 ms * 27 ms 75.149.228.250
10 61 ms 57 ms 68 ms vlan5.icore2.dtx-dallas.as6453.net [206.82.141.30]
11 58 ms 56 ms 57 ms if-6-0-0-1697.core2.dtx-dallas.as6453.net [66.19
8.2.1]
12 67 ms 65 ms 93 ms ix-4-2.core2.dtx-dallas.as6453.net [66.198.2.14]

13 67 ms 66 ms 67 ms ae2-p111.msr2.mud.yahoo.com [216.115.104.111]
14 61 ms 67 ms 74 ms te-7-1.fab2-a-gdc.mud.yahoo.com [209.191.78.139]

15 64 ms 61 ms 60 ms unknown-209-191-78-173.yahoo.com [209.191.78.173
]
16 61 ms 59 ms 61 ms ir1.fp.vip.mud.yahoo.com [209.191.122.70]

Trace complete.

Would you be able to tell me why half of the computers get 32ms for a 5 minutes straight with a ping yahoo.com -t command, and the others get the 60-100's

Thanks for your quick replys!!!

by cg it

As you can see, there's a number of next hop routers to get from your place to yahoo's place.

from your post:

1 12 ms <1 ms <1 ms 10.1.10.1
2 11 ms 7 ms 8 ms 73.147.212.1
3 9 ms 8 ms 8 ms 68.85.73.81
4 16 ms 9 ms 9 ms te-9-2-ur01.eliverpool.oh.pitt.comcast.net [68.8
6.100.17]
5 10 ms 17 ms 9 ms te-8-1-ur01.beaverfalls.pa.pitt.comcast.net [68.
86.100.13]
6 15 ms 11 ms 11 ms te-8-3-ar01.pittsburgh.pa.pitt.comcast.net [68.8
7.173.13]
7 24 ms 25 ms 24 ms te-2-0-0-0-cr01.chicago.il.ibone.comcast.net [68
.86.91.85]
8 25 ms 25 ms 23 ms pos-0-3-0-0-pe01.350ecermak.il.ibone.comcast.net
[68.86.86.158]
9 36 ms * 27 ms 75.149.228.250
10 61 ms 57 ms 68 ms vlan5.icore2.dtx-dallas.as6453.net [206.82.141.30]
11 58 ms 56 ms 57 ms if-6-0-0-1697.core2.dtx-dallas.as6453.net [66.19
8.2.1]
12 67 ms 65 ms 93 ms ix-4-2.core2.dtx-dallas.as6453.net [66.198.2.14]

13 67 ms 66 ms 67 ms ae2-p111.msr2.mud.yahoo.com [216.115.104.111]
14 61 ms 67 ms 74 ms te-7-1.fab2-a-gdc.mud.yahoo.com [209.191.78.139]

15 64 ms 61 ms 60 ms unknown-209-191-78-173.yahoo.com [209.191.78.173
]
16 61 ms 59 ms 61 ms ir1.fp.vip.mud.yahoo.com [209.191.122.70]

Trace complete.

No one in the list is terribly bad except for the dallas hops.

And if the workstations has some stuff going on in the background or the firewall IPS checks or the workstation firewall or something else, you could get the 90 millisecond response time and it's not really your network that's the culprit.

but losing internet connectivity... you really need to look at your traffic on your WAN port that connects you to the internet

by cudmasters los

what is the best way to check wan port traffic, and the ips firewall. I sincerely appreciate your fast responces. I'm not trying to be a pain in the butt, I'm just a very eager learner. I get hooked to this stuff, can't quit till i figure it out, know what i mean.It's all about learning.
:) :)

by cg it

I can capture all inbound and outbound traffic and review. Syslog also allows realtime alerts and filtering so if I only want to see traffic originated from inbound I can do that because my perimeter router creates a log for that.

by cudmasters los

thanks for your help, now i just need to learn about packet bytes and flows, & how to use qos, or if i should

by cg it

it's just setting a metric that the router uses to determine what service gets priority if available bandwidth gets used up. The theory is the same for any router.

by cudmasters los

CG IT,

Thanks for all your help, i am able to understand alot more of whats going on behind the scenes. Prompt responses, I thank you!!!!

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