Configuring TWAMP Client and TWAMP Server to Reconnect Automatically After TWAMP Server Unavailability
You can run TWAMP client automatically without any manual intervention during network failures or configuration changes. In case of a network outage or connection loss between a TWAMP client and TWAMP server, all the affected TWAMP TCP control connections and UDP test-sessions are lost. At each test-interval, the TWAMP client continues to send the control packets to re-establish connectivity with TWAMP server till is successful. All the statistics will be maintained during that network failure.
This procedure is for Junos OS only. To configure the TWAMP client:
To configure the TWAMP server:
Configure the interfaces.
[edit interfaces] user@router1# set si-1/1/0 unit 30 family inet user@router1# set si-1/1/0 unit 30 rpm twamp-server user@router1# set si-1/1/0 unit 30 family inet address 192.02.2/24
Configure the chassis.
[edit chassis] user@router1# set fpc 1 pic 1 inline-services bandwidth 1g
Configure the services.
[edit services] user@router1# set rpm twamp server tcp-keepidle 200 user@router1# set rpm twamp server tcp-keepintvl 20 user@router1# set rpm twamp server tcp-keepcnt 210 user@router1# set rpm twamp server authentication-mode none user@router1# set rpm twamp server server-inactivity-timeout 5 user@router1# set rpm twamp server reflector-inactivity-timeout 15 user@router1# set rpm twamp server max-connection-duration 0 user@router1# set rpm twamp server maximum-sessions 100 user@router1# set rpm twamp server maximum-sessions-per-connection 50 user@router1# set rpm twamp server maximum-connections 500 user@router1# set rpm twamp server maximum-connections-per-client 500 user@router1# set rpm twamp server port 862 user@router1# set rpm twamp server client-list Client1 address 192.168.20.1/24
When the TWAMP server is reachable, the output for Junos OS
is as follows. The TWAMP-Server-Status is Connected and the Number-Of-Retries-With-TWAMP-Server is 1
user@router1> show services rpm twamp client probe-results | no-more
Jan 11 11:43:42
Owner: c1, Test: t1
server-address: 192.0.2.2, server-port: 862, Client address: 192.168.20.1, Client port: 58991
TWAMP-Server-Status: Connected, Number-Of-Retries-With-TWAMP-Server: 1
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 20 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:43:41 2019
Probe rcvd/timeout time: Fri Jan 11 11:43:41 2019
Rtt: 57 usec, Egress jitter: 1 usec, Ingress jitter: -1 usec, Round trip jitter: 0 usec
Egress interarrival jitter: 43 usec, Ingress interarrival jitter: 43 usec, Round trip interarrival jitter: 1 usec
Results over current test:
.......
........
Owner: c1, Test: t2
server-address: 192.0.2.2, server-port: 862, Client address: 192.168.20.1, Client port: 58991
TWAMP-Server-Status: Connected, Number-Of-Retries-With-TWAMP-Server: 1
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 15 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:43:36 2019
Probe rcvd/timeout time: Fri Jan 11 11:43:36 2019
Rtt: 58 usec, Egress jitter: 1 usec, Ingress jitter: -1 usec, Round trip jitter: 0 usec
Egress interarrival jitter: 28 usec, Ingress interarrival jitter: 28 usec, Round trip interarrival jitter: 0 usec
Results over current test:
Probes sent: 15, Probes received: 15, Loss percentage: 0.000000
Measurement: Round trip time
Samples: 15, Minimum: 57 usec, Maximum: 59 usec, Average: 58 usec, Peak to peak: 2 usec, Stddev: 1 usec, Sum: 866 usec
Measurement: Positive egress jitter
........
Measurement: Round trip time
Samples: 105, Minimum: 57 usec, Maximum: 59 usec, Average: 58 usec, Peak to peak: 2 usec, Stddev: 1 usec, Sum: 6062 usec
Measurement: Positive egress jitter
Samples: 77, Minimum: 0 usec, Maximum: 398 usec, Average: 12 usec, Peak to peak: 398 usec, Stddev: 63 usec, Sum: 925 usec
Measurement: Negative egress jitter
Samples: 18, Minimum: 16 usec, Maximum: 431 usec, Average: 69 usec, Peak to peak: 415 usec, Stddev: 91 usec, Sum: 1248 usec
Measurement: Positive ingress jitter
Samples: 19, Minimum: 0 usec, Maximum: 431 usec, Average: 66 usec, Peak to peak: 431 usec, Stddev: 90 usec, Sum: 1249 usec
Measurement: Negative ingress jitter
Samples: 76, Minimum: 1 usec, Maximum: 397 usec, Average: 12 usec, Peak to peak: 396 usec, Stddev: 63 usec, Sum: 922 usec
Measurement: Positive round trip jitter
Samples: 79, Minimum: 0 usec, Maximum: 1 usec, Average: 0 usec, Peak to peak: 1 usec, Stddev: 0 usec, Sum: 26 usec
Measurement: Negative round trip jitter
Samples: 25, Minimum: 1 usec, Maximum: 1 usec, Average: 1 usec, Peak to peak: 0 usec, Stddev: 0 usec, Sum: 25 usec
After the server is deactivated using the command deactivate
interfaces si-1/1/0 unit 30 , the output is as follows for Junos
OS. The TWAMP-Server-Status is Not Connected and the Number-Of-Retries-With-TWAMP-Server is 12:
user@router1> show services rpm twamp client probe-results control-connection c1 | no-more
Jan 11 11:48:24
Owner: c1, Test: t1
server-address: 192.0.2.2, server-port: 862, Client address: 192.168.20.1, Client port: 58991
TWAMP-Server-Status: Not Connected, Number-Of-Retries-With-TWAMP-Server: 12
Reflector address: 192.0.2.2, Reflector port: 14779, Sender address: 192.168.20.1, sender-port: 14779
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 20 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:45:38 2019
Probe rcvd/timeout time: Fri Jan 11 11:45:38 2019
Rtt: 55 usec, Egress jitter: -17 usec, Ingress jitter: 18 usec, Round trip jitter: 1 usec
Egress interarrival jitter: 37 usec, Ingress interarrival jitter: 37 usec, Round trip interarrival jitter: 0 usec
Results over current test:
Probes sent: 10, Probes received: 10, Loss percentage: 0.000000
Measurement: Round trip time
.........
Samples: 17, Minimum: 0 usec, Maximum: 3 usec, Average: 0 usec, Peak to peak: 3 usec, Stddev: 1 usec, Sum: 4 usec
Measurement: Negative round trip jitter
Samples: 3, Minimum: 1 usec, Maximum: 3 usec, Average: 2 usec, Peak to peak: 2 usec, Stddev: 1 usec, Sum: 5 usec
Results over all tests:
Probes sent: 210, Probes received: 210, Loss percentage: 0.000000
........
TWAMP-Server-Status: Not Connected, Number-Of-Retries-With-TWAMP-Server: 12
Reflector address: 192.0.2.2, Reflector port: 14778, Sender address: 192.168.20.1, sender-port: 14778
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 15 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:45:38 2019
Probe rcvd/timeout time: Fri Jan 11 11:45:38 2019
Rtt: 58 usec, Egress jitter: -18 usec, Ingress jitter: 19 usec, Round trip jitter: 0 usec
..........
Results over all tests:
Probes sent: 160, Probes received: 160, Loss percentage: 0.000000
Measurement: Round trip time
Samples: 160, Minimum: 57 usec, Maximum: 59 usec, Average: 58 usec, Peak to peak: 2 usec, Stddev: 1 usec, Sum: 9232 usec
Measurement: Positive egress jitter
Samples: 119, Minimum: 0 usec, Maximum: 398 usec, Average: 12 usec, Peak to peak: 398 usec, Stddev: 62 usec, Sum: 1398 usec
Measurement: Negative egress jitter
Samples: 27, Minimum: 16 usec, Maximum: 431 usec, Average: 64 usec, Peak to peak: 415 usec, Stddev: 76 usec, Sum: 1723 usec
Measurement: Positive ingress jitter
Samples: 28, Minimum: 0 usec, Maximum: 431 usec, Average: 62 usec, Peak to peak: 431 usec, Stddev: 76 usec, Sum: 1727 usec
Measurement: Negative ingress jitter
Samples: 118, Minimum: 1 usec, Maximum: 397 usec, Average: 12 usec, Peak to peak: 396 usec, Stddev: 62 usec, Sum: 1400 usec
Measurement: Positive round trip jitter
Samples: 120, Minimum: 0 usec, Maximum: 1 usec, Average: 0 usec, Peak to peak: 1 usec, Stddev: 0 usec, Sum: 39 usec
Measurement: Negative round trip jitter
Samples: 39, Minimum: 1 usec, Maximum: 1 usec, Average: 1 usec, Peak to peak: 0 usec, Stddev: 0 usec, Sum: 39 usec
After activating the server using the activate interfaces
si-1/1/0 unit 30 command the output is as follows for Junos
OS. The TWAMP-Server-Status is Connected and the Number-Of-Retries-With-TWAMP-Server is 12.
user@router1> show services rpm twamp client probe-results control-connection c1 | no-more
Jan 11 11:48:50
Owner: c1, Test: t1
server-address: 192.0.2.2, server-port: 862, Client address: 192.168.20.1, Client port: 58991
TWAMP-Server-Status: Connected, Number-Of-Retries-With-TWAMP-Server: 12
Reflector address: 192.0.2.2, Reflector port: 14963, Sender address: 192.168.20.1, sender-port: 14963
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 20 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:48:50 2019
Probe rcvd/timeout time: Fri Jan 11 11:48:50 2019
.....
Results over all tests:
Probes sent: 218, Probes received: 218, Loss percentage: 0.000000
Measurement: Round trip time
Samples: 218, Minimum: 54 usec, Maximum: 59 usec, Average: 56 usec, Peak to peak: 5 usec, Stddev: 1 usec, Sum: 12160 usec
......
Owner: c1, Test: t2
server-address: 192.0.2.2, server-port: 862, Client address: 192.168.20.1, Client port: 58991
TWAMP-Server-Status: Connected, Number-Of-Retries-With-TWAMP-Server: 12
Reflector address: 192.0.2.2, Reflector port: 14962, Sender address: 192.168.20.1, sender-port: 14962
Routing Instance Name: IN
Destination interface name: si-2/2/0.10
Test size: 15 probes
Probe results:
Response received
Probe sent time: Fri Jan 11 11:48:50 2019
Probe rcvd/timeout time: Fri Jan 11 11:48:50 2019
Rtt: 57 usec, Egress jitter: 2 usec, Ingress jitter: -3 usec,
......
Results over all tests:
Probes sent: 168, Probes received: 168, Loss percentage: 0.000000
Measurement: Round trip time
Samples: 168, Minimum: 57 usec, Maximum: 59 usec, Average: 58 usec, Peak to peak: 2 usec, Stddev: 1 usec, Sum: 9691 usec
Measurement: Positive egress jitter
Samples: 124, Minimum: 0 usec, Maximum: 398 usec, Average: 11 usec, Peak to peak: 398 usec, Stddev: 61 usec, Sum: 1406 usec
Measurement: Negative egress jitter
Samples: 29, Minimum: 16 usec, Maximum: 431 usec, Average: 62 usec, Peak to peak: 415 usec, Stddev: 74 usec, Sum: 1806 usec
Measurement: Positive ingress jitter
Samples: 30, Minimum: 0 usec, Maximum: 431 usec, Average: 60 usec, Peak to peak: 431 usec, Stddev: 74 usec, Sum: 1811 usec
Measurement: Negative ingress jitter
Samples: 123, Minimum: 1 usec, Maximum: 397 usec, Average: 11 usec, Peak to peak: 396 usec, Stddev: 61 usec, Sum: 1410 usec
Measurement: Positive round trip jitter
Samples: 125, Minimum: 0 usec, Maximum: 1 usec, Average: 0 usec, Peak to peak: 1 usec, Stddev: 0 usec, Sum: 42 usec
Measurement: Negative round trip jitter
Samples: 42, Minimum: 1 usec, Maximum: 1 usec, Average: 1 usec, Peak to peak: 0 usec, Stddev: 0 usec, Sum: 42 usec