Bandwidth command

"Router (config) #bandwidth <value>" This command set bandwidth value for an interface. Is this correct command? Should this issue in interface config mode or global mode? Can bandwidth command use to limit the bandwidth of an interface? What is the default bandwidth for interfaces? Unlimited? Will this command works with sub-interface too?

The bandwidth command is applicable only to interfaces, not the global level. It is used to determine the link cost for link-state protocols, among other things. It does not affect the actual bandwidth of the interface. And it certainly does work with sub-interfaces.
Paresh

Similar Messages

Bandwidth command in 3500Xl switches

Hi,
I have seen a bandwidth command in the interface config mode. When I apply it, it does not limit the traffic.
I have to limit a traffic on a perticular port to which a PC is connected.
THanx
sagar

Hi,
thanx for ur reply. I tried for policing the traffic.
I created a class-map, then applied that class to the policy map. But when I try to apply the policy to the interface, there is no effect of the command nor does the applied command shows up in the show run.
The config is as given below:-
class-map limit
match access-group 2
policy-map rate
class limit
bandwidth 100
access-list 2 permit 10.3.22.204
Switch(config)#int f0/15
Switch(config-if)#service-policy input rate
The last command is not reflected in the sh run
sagar

Which object in RSVP message carried the value configured by "tunnel mpls traffic-eng bandwidth" command?

Hi Experts,
I configured a simple MPLS TE tunnel in my routers and configured it with "tunnel mpls traffic-eng bandwidth 777" command. The tunnel came up fine. I tried to capture the packets (using GNS capture) going out of tunnel head end interface but I could not find out on which message object the value '777' is carried. Can anyone please explain me exactly in which RSVP/OSPF message the bandwidth value is carried?
Thanks,
Madhu

Hello Madhu,
I think it is FLOWSPEC object, not 100% sure
The FLOWSPEC class is defined in RFC 2210. Cisco IOS Software requests Controlled-Load service when reserving a TE tunnel. The FLOWSPEC format is complex and has many things in it that RSVP for MPLS TE doesn't use.The FLOWSPEC is used in Resv messages—Resv, ResvTear, ResvErr, ResvConf, ResvTearConf. Its only use in MPLS TE is to use the average rate section of the FLOWSPEC to specify the bandwidth desired, in bytes. Not bits. Bytes. So if you configure a tunnel with tunnel mpls traffic-eng 100000 to request 100 Mbps of bandwidth, this gets signalled as 12,500,000 bytes per second (100 Mb is 100,000 Kb is 100,000,000 bits, which is 12,500,000 bytes).
Hope this helps
Regards
Mahesh

2960x port channel bandwidth command workaround

Folks:
I am looking for a work around - Currently I have a four member 2960x switch stack - I have Ten 1/0/1 and Ten 3/0/1 in a port-channel; however, when I try to set the 'bandwidth' on PO1 interface to 20000000 I receive an error, which corresponds being out of range, due to the links being 10Gbps.
Is there a work around so my PO1 interface reflects the correct bandwidth?
Switch I am using and version of software
Switch Ports Model SW Version SW Image
* 1 52 WS-C2960X-48TD-L 15.0(2)EX5 C2960X-UNIVERSALK9-M
Thank you
JJ

The tx-/rxload is probably the least of your problems. Assuming we're talking about a L2 port-channel the interface BW is base for spanning tree cost calculation. With a BW 10000000 kbit/s STP would consider the port-channel equal to a single 10GE link and could possibly decide to block your port-channel for a less favorable link.
That being said, the port-channel is supposed to have the correct BW corresponding to the number of bundled links without any need for manual user configuration.
I suppose it is either a software bug or there is an interface not bundled correctly.
Post the result of 'show etherc sum' here to check.
Regards

Bandwidth remote vs bandwidth interzone

The gatekeeper configured one local zone and one remote zone. We will use gatekeeper bandwidth CAC for controlling the number of calls from local zone to remote zone.
In this case, which bandwidth command I should use. Bandwidth remote or bandwidth interzone? Is there any difference between those two commands in this case?
Thanks,
JJ

So in my case, I can also use bandwidth interzone command instead of bandwidth remote for controlling the number of calls between the local zone and the remote zone which is configured on a remote gatekeeper? see the following:
Gatekeeper
zone local localzone cisco.com
zone remote remotezone cisco.com 10.10.10.1 1719
bandwidth interzone localzone 128
no shutdown
Is it correct?
JJ

Tunnel - using Tunnel Bandwidth

I have a quick question here what is the purpose of using the Tunnel Bandwidth command for and is it necessary on a point to point connection? Reason why I ask is that we have a point to point connection and a tunnel is riding over this connection. We every now and then I notice high latency on this connection. I noticed that the bandwidth transmit/receive is set up for 8k only while the point-to-point connection is 128k. I'm thinking this is the cause of the latency...your thoughts?

Hi
hope this helps..
http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=WAN%2C%20Routing%20and%20Switching&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dddc3e4
regds

Bandwidth allocation | default class|CBWFQ

Hi everybody
Let say we have 100 mig circuit. Max -reserved bandwidth is 100 mig as well. We make following allocations:
Class A
bandwidth 20
Class B
bandwidth 60
Class Default.
1)We did not make any bandwidth allocations for default class. Assuming We are congested ( i.e class A, class B ), What is the maximum bandwidth Class Default can use?
2) Let say we are congested ( classA,classB) but there is no traffic in default class. How will this unused 20 mig will be distributed among these classA and class B?
++++++++++++++++++++++++++++++++++
I am getting confusing answers:
For example:
From one of theblog ( Dont want pick on author so did not quote it)
You'll want to configure a bandwidth command under the class class-default Otherwise, IOS will divide any unallocated bandwidth equally among all classes; this can result in the class-defaulthaving a very small amount of bandwidth.
Cisco QOS Documentation says:
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_cr.pdf
From the above link:
The following output from theshow policy-map interfacecommand on serial interface 3/2 shows that 500 kbps of bandwidth is guaranteed for the class
named voice1. The classes named class1 and class2 receive 50 percent and 25 percent of the remaining bandwidth, respectively. Any unallocated bandwidth
is divided proportionally among class1, class2, and any best-effort traffic classes
Which One is true statement?
If Cisco documentation is correct, then what proportion of unallocated bandwidth is given to default class as there is no bandwidth percentage configured under default class.
Thanks

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Posting
#2 If there's just traffic for classes A and B, they will proportionally share it 20:60 or 1:3 (or 25%:75%). (NB: the former is assuming they want "more". If not, actual usage might not reflect bandwidth allocation. For example, if class B only used/wanted 50% of link, class A could obtain the other 50%.)
#1 recall finding some blog that really went deep into what class-default gets when you don't explicitly allocate bandwidth. I also recall it may have been IOS version dependent and whether FIFO or FQ was defined in class-default (this also was pre-HQF).
It was very complicated, and IMO, best avoided by defining bandwidth in class-default, if class-default usage, relative to other defined classes, is important to your QoS policy.
Generally, if something isn't clearly documented as expected behavior, I avoid relying on "discovered" actual behavior, because it might change with next IOS release.

Bandwidth alloted and link utilization

Hello,
I have a query and need to understand.
we have recently asked for a 16mbps mpls ip vpn link for business purporse.
is there a way if we can see anywhere the total bandwidth alloted by the service provider or we need to configure it manually ? also how can we calculate actual link utilization on any given link/interface ?we are using a 2820 cisco router and cisco asa5505 .
many thanks
Raj

Hi
--- > is there a way if we can see anywhere the total bandwidth alloted by the service provider
The SP will allocate the bandwidth as per your instruction & That is using Rate limit in PE router.
SP will configure the rate limit on PE to limit the bandwidth.
http://www.cisco.com/en/US/docs/ios/12_0/qos/command/reference/qrcmdr.html#wp1017761
---- > we need to configure it manually
You don't need to configure the bandwidth and Bandwidth command never limit the bandwidth on interface , the use of bandwidth command is to set the bandwidth on interface & that is used for calculation of metric in dynamic routing or it is user when you plan to configure QOS.
---- > how can we calculate actual link utilization on any given link/interface
So see the acutal usage , you can use bandwidth monitoring tools like PRTG , Solar wind, Whatsup, Cacti etc. & for that you need to configure SNMP string on router to pull data by this tools. ( Use PRTG Traffic Grapher is easy & good for actual bandwidth monitoring ).
And for more detailed you can use Netflow analyzer for deep inspection of traffic but for that you need to configure netflow in routers.
http://demo.netflowanalyzer.com/netflow/jspui/NetworkSnapShot.jsp
Regards
Chetan Kumar
http://chetanress.blogspot.com

ME3400E egress bandwidth management

With help from this site, I was able to figure out ingress bandwidth management on a per port basis, but now I need to be able to configure egress bandwidth management. I think I need to do traffic shaping but am not sure. I was told that if you configure the bandwidth management using a percentage, that it doesnt' use the actual negotiated (or configured) port speed, but looks at the bandwidth interface command - is this true? If a port is set to autonegotiate, and comes up as a GigE port, but the bandwidth command is set to 100Mbps, if you configured the egress shaping to 10% would that set it to 100Mbps or 10Mbps? We are using the ME3400E to provide internet access to our customers - egress bandwidth management is very important !

We had the same problem. Rate Control didn't seem to work.
I discovered that after changing the rate control settings and saving these settings the router needs a reboot.
Otherwise the rate control does not work anymore and the bandwidth is not managed.
Whenever something is modified in the rate control settings you have to reboot the router.

Grant bandwidth (CBWFQ?)

Hi Team,
i am new to the community so i greet you all!
My doubts and problems are related to the need to shape the traffic of a class granting a minimum bandwidth.
We have a 7206-VXR so we have Gigabit physical interfaces, our SP is granting 200Mbps.
The shape is working fine but the bandwidth command don't trigger couse, for my router, there's no congestion.
I think that this is a common problema and maybe i am trying to solve in the wrong way.
Any suggestion is appreciated
Thanks in advance
Denis

Hi Denis,
Shaping using the 'shape' cli defines the max rate for a class; whereas, the 'bandwidth' cli defines the minimum bandwidth guarantee for that class under functional congestion.
For example,
policy-map test
class A
shape average percent 20
class B
bandwidth percent 10
class C
bandwidth percent 30
- Traffic through class A will *always* get shaped to 20% of intf bandwidth. Doesn't matter whether the interface is congested or not.
- Traffic through class B and Class C will get a *minimum* guarantee of 10 and 30% of intf bandwidth when the interface is congested. When the interface is not congested, then there is really no need for a queueing policy (~ bandwidth cli) and the queueing part of the policy won't kick in. So, class B / class C can basically use the entire intf bandwidth if there is no traffic through the other (bandwidth) classes. However, should the physical interface be congested (tx_ring is full) then queueing kicks in and each class is given a minimum guarantee that's configured. The remaining bandwidth is shared amongst the bandwidth classes in the ratio of guarantees.
- Abhi

Max-reserved-bandwidth 100% for the interface

According to CCO as following text, the remaining 25 percent of bandwidth is used for overhead, including Layer 2 overhead, control traffic, and best-effort traffic. I want to know why cisco choose 25 percent. why not 30% or 20%?
If I config the max-reserved-bandwidth 100% for the interface, does it will effect the routing protocol? also effect the network conectivity?
thanks for your answer
=======
Usage Guidelines for max-reserved-bandwidth
The sum of all bandwidth allocation on an interface should not exceed 75 percent of the available bandwidth on an interface. The remaining 25 percent of bandwidth is used for overhead, including Layer 2 overhead, control traffic, and best-effort traffic.
If you need to allocate more than 75 percent for RSVP, CBWFQ, LLQ, IP RTP Priority, Frame Relay IP RTP Priority, and Frame Relay PIPQ, you can use the max-reserved-bandwidth command. The percent argument specifies the maximum percentage of the total interface bandwidth that can be used.
If you do use the max-reserved-bandwidth command, make sure that not too much bandwidth is taken away from best-effort and control traffic.
The max-reserved-bandwidth command is intended for use on main interfaces only; it has no effect on virtual circuits (VCs) or ATM permanent virtual circuits (PVCs).

Kevin,
this is the wrong group for this question.
Gilles.

Error while applying the Service Policy

Hi,
I am getting the below error while applying the service policy to the Interface.
I have set the mpls exp 4 as well as want to limit the bandwidth to 1Mbps
PE#sh policy-map setexp-GBoIP
Policy Map setexp-GBoIP
    Class GBoIP-traffic
      set mpls experimental imposition 4
     police cir 1024000 bc 32000
       conform-action transmit
       exceed-action drop
PE(config-if)#int vlan 2007
PE(config-if)#service-policy input setexp-GBoIP
QoS-ERROR: Addition/Modification made to policymap setexp-GBoIP and class GBoIP-traffic is not valid, command is rejected
As well as I have created new clas--map with priority and Bandwidth and applied in output direction, I got the belwo error while applying the Service policy in
PE(config-if)#service-policy out TEST
bandwidth command is not supported in output direction for this interface
PE(config-if)#service-policy output TEST
priority command is not supported in output direction for this interface
Any idea why so ?
Thanks in Advance.
Regards,
Nilesh

Check the current value of IGW_AWARDS_S sequence and make sure the MINVALUE in the patch (i.e. 10000) is not greater than the current one.
OERR: ORA 4007 MINVALUE cannot be made to exceed the current value (Doc ID 19824.1)
You may also log a SR.
Thanks,
Hussein

Problem !!= Need help about "police cir" in MLS cisco 7604

hi all ,
i have MLS cisco 7604 ,
i tried to use QOS to dedicate cir for specific subnet , but it failed , it seems that bandwidth command dont work on that platform !!!
my 1st question eis can i apply QOS and use bandwidth command ??? is it impossible ????
=============================================================================================
my 2nd question is ,
i have 600 M as total download traffic ,
i want to limit the bw on the interface from 600M to 520 M
i configured the following :
================================================
Gateway7600#
sh ip access-lists drvirus
Extended IP access list drvirus
     10 deny ip any x.x.x.0 0.0.0.31 (1802 matches)
     20 permit ip any any (2507719 matches)
=================================================
Gateway7600#
sh class-map drvirus
Class Map match-all drvirus (id 4)
    Match access-group name drvirus
===================================================
Gateway7600#
sh policy-map drvirus
   Policy Map drvirus
     Class drvirus
police cir 500000000 bc 93750000 be 187500000
    conform-action transmit
    exceed-action drop
    violate-action drop
====================================================
Gateway7600#
sh running-config interface gigabitEthernet 1/5
Building configuration...
Current configuration : 258 bytes
interface GigabitEthernet1/5
description 7600to7200
mac-address 503d.e5af.9c45
ip address 172.30.40.2 255.255.255.252
ip wccp 70 redirect in
ip wccp 90 redirect in
load-interval 30
service-policy input drvirus
service-policy output rateupload
end
==========================================================================
but when i try to put under the interface level ,
service-policy input drvirus
it fails and give me the error ===>
Gateway7600(config-if)#service-policy input drvirus
burst (bc) must be between 1000 and 31250000 for this interface
Configuration failed on GigabitEthernet1/5
i tried another trial ,
i changed police cir from
police cir 500000000 bc 93750000 be 187500000
to ===>
police cir 500000000 bc 250000 be 1000
after that , it was accepted under the interface command.
but i dont see any limitation in bw !!!!!!!
wish to help me =============?
================================================
i have the following speifications :
Gateway7600#sh module
Mod Ports Card Type                                     Model                 Serial No.
   1    9 Supervisor Engine 32 8GE (Active)       WS-SUP32-GE-3B      SAD104204GX
Mod MAC addresses                            Hw   Fw              Sw             Status
   1 0018.bad2.2324 to 0018.bad2.232f 4.4   12.2(18r)SX   15.2(4)       Ok
Mod Sub-Module                      Model                 Serial        Hw      Status
   1 Policy Feature Card 3        WS-F6K-PFC3B        SAD104201HK 2.3    Ok
   1 Cat6k MSFC 2A daughterboard WS-F6K-MSFC2A       SAD104004UC 3.1    Ok
Mod Online Diag Status
   1 Pass
===================================================================
Gateway7600#sh version
Cisco IOS Software, c7600s3223_rp Software (c7600s3223_rp-ADVENTERPRISEK9-M), Version 15.2(4)S, RELEASE SOFTWARE (fc1)
Technical Support:
http://www.cisco.com/techsupport
Copyright © 1986-2012 by Cisco Systems, Inc.
Compiled Fri 20-Jul-12 18:18 by prod_rel_team
ROM: System Bootstrap, Version 12.2(17r)SX3, RELEASE SOFTWARE (fc1)
BOOTLDR: Cisco IOS Software, c7600s3223_rp Software (c7600s3223_rp-ADVENTERPRISEK9-M), Version 15.2(4)S, RELEASE SOFTWARE (fc1)
Gateway7600 uptime is 32 weeks, 7 hours, 6 minutes
Uptime for this control processor is 13 weeks, 7 hours, 10 minutes
System returned to ROM by power-on (SP by power-on)
System restarted at 06:26:11 UTC Sat Apr 20 2013
System image file is "sup-bootdisk:c7600s3223-adventerprisek9-mz.152-4.S.bin"
Last reload type: Normal Reload
Last reload reason: Reload Command
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
cisco CISCO7604 (R7000) processor (revision 2.0) with 458752K/65536K bytes of memory.
Processor board ID FOX1509G2DK
R7000 CPU at 300MHz, Implementation 39, Rev 3.3, 256KB L2, 1024KB L3 Cache
Last reset from power-on
1 Virtual Ethernet interface
9 Gigabit Ethernet interfaces
1915K bytes of non-volatile configuration memory.
65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102
===================================================================================

any suggestion ??? any help ???

Interface OSPF cost issue

Image link (the image above looks distorted in the post preview): http://fodder.s3.amazonaws.com/ospf-cost-diagram.jpg
In the test network shown in the diagram I have the following issue that I can't seem to figure out:
Without any modification to ospf interface cost traffic from R8 to 172.16.88.1 (R5) takes R3 --> R2 --> R5 (total metric 67).
This is not ideal because of the f1/0 interface on R2. The path via R3 --> R4 --> R6 --> R5 (total metric 68) is actually preferable but is not selected because of OSPF's baseline inability to distinguish between FastEthernet and greater link speeds.
I am fully aware that I can use the auto reference-bandwidth command on all the routers to fix things but I am testing behaviors of the ip ospf cost command at the moment.
Setting the ospf cost of the f1/0 interface on R2 to 10 changes the path for traffic coming from R8 on its way to 172.16.88.1 (R5). This is desired result. However, the return traffic from R5 continues to use the path through R2 (R2 --> R3 --> R8). This is what is illustrated in the dotted arrows in the included image. R2's interface cost is not being taken into account by R5, which I am assuming is because R5 respects his own interface cost on the link over R2's cost. However, this is producing a sub-optimal return path.
My question is this: Aside from using a route map is there an ospf configuration that I am overlooking that will cause R5 to stop thinking that the path through R2 is preferred?

Hi Colin,
The only way I could solve this was to change the cost on the return path of R5 to R8. It isn't tidy, but setting the ip ospf cost on R2's G0/0 port to 10, changes the cumulative path from R5 to R8.
I changed the reference bandwidth to 1000 in the topology to see how this would changes things. I just learnt that a 'no ip ospf cost' on both int g0/0 and f1/0 on R2, does not change the cost by itself, so had to clear the ospf process in order to affect the cost. Not sure if this is normal behaviour...
With no ip ospf cost configured on R2, and the ref bw changed to 1000, the path from R8 to R5 now takes the optimal path. However traffic R5 to R8 will still take the path through R2. Checking on the cost of G0/0 on R5 the cost is 1.
Great scenario... to get the optimal return path,R5 through R6 to R8, R2's G0/0 port needed manual adjusting to 10, so R5 would not have R2 as the best path to reach R8.
Taking R2 off the shared link of R5 and R6 and having it's own Fastethernet connection to R5 would be the simplest solution? Thanks for sharing Colin.
Cheers, Jeremy.

ADSL QOS service policy

My ISP has said they will set up their side to give 50% policed real time traffic and 30% for our application traffic burstable then 5% anything else burstable. The QOS below is my attempt to do this but I was advised that to apply it to the Dialer 1 interface I hade to create a second policy-map (ADSLOut) which had the class-default and the child policy (QOSADSL) within that.
When I did this I can't apply it to the Dialer 1 interface but if I use the child policy then it will allow me to apply that, will this work the same way.
class-map match-all RealTime
match ip dscp ef
class-map match-all General
match any
class-map match-any Application
match ip dscp cs3
match ip dscp af41
policy-map QOSADSL
class RealTime
bandwidth percent 50
class Application
priority percent 30
class General
priority percent 5
class class-default
shape peak percent 85
policy-map ADSLOut
class class-default
service-policy QOSADSL
interface Dialer1
<Snipped>
bandwidth 1240
ip nbar protocol-discovery
ip flow ingress
ip flow egress
load-interval 30
tx-ring-limit 3
tx-queue-limit 3
service-policy output QOSADSL
or
service-policy output ADSLOut

Hi @scotlandvisit,
My first opinion is a recomendation: in the policy-map, when you're configuring LLQ use the priority command for delay-sensitive traffic (Voice) and the bandwidth command for the rest. This is because the priority command is used to indentify a class as a "strict priority class" which in my opinion should be the voice traffic and the bandwidth command is used to allocate bandwidth to nonpriority classes.
The interface is not letting you apply the service-policy because you have to configure shaping inside the class-default of the parent policy-map. This shape is going to be the value in bps that you want to assing to the traffic classes that you've configured. For example, let's say that you want to allocate 1Mbps for all the classes.
policy-map QOSADSL
class RealTime
priority percent 50
class Application
bandwidth percent 30
class General
bandwidth percent 5
class class-default
shape peak percent 85
policy-map ADSLOut
class class-default
shape average 1000000
service-policy QOSADSL
interface Dialer1
service-policy output ADSLOut
Try this configuration and let me know.
HTH.
Rgrds,
Martin, IT Specialist

Bandwidth command

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