Load on GRE tunnel interface.
Hi Experts,
R1#sh run int tu 0
Building configuration...
Current configuration : 216 bytes
!
interface Tunnel0
bandwidth 4000
ip address 1.1.1.1 255.255.255.0
load-interval 30
tunnel source FastEthernet0/0
tunnel destination 12.1.1.2
tunnel bandwidth transmit 4000
tunnel bandwidth receive 4000
end
R1#sh int tu0
Tunnel0 is up, line protocol is up
Hardware is Tunnel
Internet address is 1.1.1.1/24
MTU 1514 bytes, BW 4000 Kbit/sec, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Can you please tell me based on what value are the tx and rx load of a GRE tunnel is calculated. Is it the interface bandwidth or the receive and transmit BW.
Comments
txload = output rate / bandwidth * 255
rxload = input rate / bandwidth * 255
Configured interface bandwidth is my understanding. Output rate and bandwidth should be converted to similar metric (ie kbps)
Thanks Dennis.
Can you please tell me what is the relevance of these commands:
tunnel bandwidth transmit 4000
tunnel bandwidth receive 4000
Those commands tell the tunnel interface at what rate it should send/receive traffic. According to the Cisco Documentation the receive command will be taken out of future releases. It is no longer used. So in essense it rate limits the outgoing traffic bandwidth on the tunnel interface.
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/command/ir-cr-book/ir-t2.html#wp4185130494
acsbmx_1,
Does it mean that on a GRE tunnel, by default we can't send data above 8000 kbps.
That is the administrative bandwidth, used for QoS, routing protocols, has nothing to do with the actual "speed" of the interface.
Regards,
Cristian.