Hardcoded BW

[Josiah Inubio]

Hi guys,

I've noticed that the default BW shown on the serial interface was BW "1544 Kbit/sec" and i've hardcoded it to 256Kbit/sec because its the subscribed BW from my client. Is it possible that there's an effect hardcoding the BW?

Refer to the configs below:

PE ROUTER

##### INTERFACE CONFIGURATION #####

exit all

enable config interface bu-1/1/1/1:138.1 ip

exit

enable config interface bu-1/1/1/1:138.1

  name "IC-AAD-3638"

  description "IC-AAD-3638"

  ip routing-instance philam

  ip address 10.63.205.233/30

  max-bandwidth 256

  mtu 1500

  sub-interface fr dlci 115

  ip admin enable

##### VR TRACK INTERFACE CONFIGURATION #####

ROUTER#sh run int s0/0/0.1

Building configuration...

Current configuration : 187 bytes

!

interface Serial0/0/0.1 point-to-point

description *** LINK TO INNOVE: IC-AAD-3638 ***

bandwidth 256

ip address 10.63.205.234 255.255.255.252

frame-relay interface-dlci 115  

end

Serial0/0/0.1 is up, line protocol is up

  Hardware is WIC MBRD Serial

  Internet address is 10.63.205.234/30

  MTU 1500 bytes, BW 256 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 1/255, rxload 2/255

  Encapsulation FRAME-RELAY IETF

  Keepalive set (10 sec)

  Last clearing of "show interface" counters never

[cadet alain · Accepted solution]

HI,

hard-coding the BW will have effect on:

-metric calculation in OSPF and EIGRP

-Qos

But it will have no effect on traffic rate.

Regards

Alain

Don't forget to rate helpful posts.

[Josiah Inubio]

Refer on the config below, its based on frame relay w/ dlci 115 and it doesn't have qos configured on it.

interface Serial0/0/0

no ip address

ip virtual-reassembly in

encapsulation frame-relay IETF

no fair-queue

frame-relay lmi-type ansi

!

interface Serial0/0/0.1 point-to-point

description *** LINK TO INNOVE: IC-AAD-3638 ***

bandwidth 256

ip address 10.63.205.234 255.255.255.252

frame-relay interface-dlci 115  

[johnlloyd_13 · Accepted solution]

as alain already mentioned, there's no bearing on the actual interface for the bandwidth command line unless you're running some dynamic routing protocols and QoS.

[Joseph W. Doherty]

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Posting

As the other posters have explained the bandwidth statement doesn't directly control/limit bandwidth.  If you do want to hold bandwidth to a logical limit (e.g. CIR) imposed by the WAN technology, you could use a shaper.