BW showing under Tunnel Interface

[GRANT3779]

Hi,

I've been looking through our VPN Tunnel Interfaces and noticed all of them have the same BW of 9Kbit. Where is this figure derived from?

sh int tu17
Tunnel17 is up, line protocol is up
  Hardware is Tunnel
  Description: Tunnel to M
  Internet address is 172.27.240.61/30
  MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
     reliability 255/255, txload 180/255, rxload 110/255
  Encapsulation TUNNEL, loopback not set
  Keepalive not set
 
  Tunnel protocol/transport GRE/IP
 

[Joseph W. Doherty]

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Posting

It's a platform/IOS default.  It can be changed using the interface bandwidth statement (on the tunnel interface).

[GRANT3779]

Thanks,

I'm assuming it's not going to come into play with anything other than routing protocols?

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Principally, I think it's also used for calculating load averages.

[Richard Burts]

The bandwidth is primarily used by routing protocols. It is also used to calculate the percentage of use of the interface so some network monitoring tools may be affected. It may also become a factor if you have configured QOS especially in the attempt to recognize congestion.

HTH

Rick