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DMVPN tunnel bandwidth

jopetik09
Level 1
Level 1

Hi All,


I have Cisco 1921, 10 MB internet link terminated and have DMVPN tunnels to our DC.
When I observed the tunnel details, found that the Tunnel transmit bandwidth 8000 (kbps). Does this mean that the tunnel can trans/received max 8 Mbps only?

I tried to change the tunnel bandwidth but not option under the tunnel to configure.
Is there any other alternative to do this change?
Shall I upgrade the IOS inorder to get the commands available?


ROUTER#sh int Tunnel10
Tunnel10 is up, line protocol is up
  Hardware is Tunnel
  Internet address is 192.168.XXX.XX/24
  MTU 17912 bytes, BW 20000 Kbit/sec, DLY 50000 usec,
     reliability 255/255, txload 7/255, rxload 13/255
  Encapsulation TUNNEL, loopback not set
  Keepalive not set
  Tunnel source 195.81.XXX.XXX (GigabitEthernet0/0)
   Tunnel Subblocks:
      src-track:
         Tunnel10 source tracking subblock associated with GigabitEthernet0/0
          Set of tunnels with source GigabitEthernet0/0, 2 members (includes iterators), on interface <OK>
  Tunnel protocol/transport multi-GRE/IP
    Key 0x3E7, sequencing disabled
    Checksumming of packets disabled
  Tunnel TTL 255, Fast tunneling enabled
  Tunnel transport MTU 1472 bytes
  Tunnel transmit bandwidth 8000 (kbps)
  Tunnel receive bandwidth 8000 (kbps)
  Tunnel protection via IPSec (profile "dmvpn-profile")
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters 1d22h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 36
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 1096000 bits/sec, 333 packets/sec
  5 minute output rate 561000 bits/sec, 345 packets/sec
     25254924 packets input, 1534383582 bytes, 0 no buffer
     Received 0 broadcasts (36494 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     26810408 packets output, 3791188121 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out




ROUTER#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
ROUTER(config)#int Tunnel10
ROUTER(config-if)#tunnel ?
  6rd                   set tunnel 6rd parameters
  checksum              enable end to end checksumming of packets
  destination           destination of tunnel
  flow                  flow options
  key                   security or selector key
  mode                  tunnel encapsulation method
  path-mtu-discovery    Enable Path MTU Discovery on tunnel
  protection            Enable tunnel protection
  raw-packet-interface  physical interface for all packets entering it to be
                        tunneled and for all packets entering the tunnel to
                        exit
  route-via             Select subset of routes for tunnel transport
  sequence-datagrams    drop datagrams arriving out of order
  source                source of tunnel packets
  tos                   set type of sevice byte
  ttl                   set time to live
  udlr                  associate tunnel with unidirectional interface
  vrf                   set tunnel vrf membership





#sh ver
Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(4)M, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 24-Mar-11 13:55 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)

ROUTER uptime is 10 weeks, 2 days, 22 hours, 20 minutes
System returned to ROM by reload at 11:51:41 UTC Sun Jul 24 2011
System image file is "flash:c1900-universalk9-mz.SPA.151-4.M.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
export@cisco.com.

Cisco CISCO1921/K9 (revision 1.0) with 491520K/32768K bytes of memory.
Processor board ID FHK14247486
2 Gigabit Ethernet interfaces
1 terminal line
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity disabled.
255K bytes of non-volatile configuration memory.
248816K bytes of USB Flash usbflash0 (Read/Write)


License Info:

License UDI:

-------------------------------------------------
Device#   PID                   SN
-------------------------------------------------
*0        CISCO1921/K9          FHK14247486

 

Technology Package License Information for Module:'c1900'

----------------------------------------------------------------
Technology    Technology-package          Technology-package
              Current       Type          Next reboot
-----------------------------------------------------------------
ipbase        ipbasek9      Permanent     ipbasek9
security      securityk9    Permanent     securityk9
data          None          None          None

Configuration register is 0x2102


Thanks in advance.

Jopeti.

3 Accepted Solutions

Accepted Solutions

The tunnel Bandwidth of 8Mbps is used by routing protocols to calculate the metrics and for QOS parameters. So this will not affect the actual data traffic flow . It is recommended to set the bandwidth to be equal to that of the physical link using the

bandwidth 

command under the tunnel interface.

View solution in original post

Hi Jopeti,

 

As said above, the bandwidth tranceive what you are seeing in tunnel interface details is not effect to main data flow.

The actual bandwidth of physical link will be used for the main data flow.


So in your case I would suggest you to sent the bandwidth under your tunnel interface as like below as you have 10 Mbps main physical link.


interface Tunnel10
bandwidth 10000


Please rate the helpful posts.
Regards,
Naidu.

View solution in original post

Exactly, both posts above agree with my response

View solution in original post

4 Replies 4

Marwan ALshawi
VIP Alumni
VIP Alumni

The actual bandwidth is depending on the physical interface of the tunnel

Try to use the command

 bandwidth

under the tunnel interface which useful for qos polices config only to be referenced

 

Hope this help

The tunnel Bandwidth of 8Mbps is used by routing protocols to calculate the metrics and for QOS parameters. So this will not affect the actual data traffic flow . It is recommended to set the bandwidth to be equal to that of the physical link using the

bandwidth 

command under the tunnel interface.

Hi Jopeti,

 

As said above, the bandwidth tranceive what you are seeing in tunnel interface details is not effect to main data flow.

The actual bandwidth of physical link will be used for the main data flow.


So in your case I would suggest you to sent the bandwidth under your tunnel interface as like below as you have 10 Mbps main physical link.


interface Tunnel10
bandwidth 10000


Please rate the helpful posts.
Regards,
Naidu.

Exactly, both posts above agree with my response

Review Cisco Networking for a $25 gift card