Session Traffic

The BNG Blaster is able to generate bidirectional unicast session traffic for all addresses assigned to a session (IPv4, IPv6 and IPv6PD).

This is a powerful tool to quickly verify that forwarding is correctly setup and working.

Configuration

The following example shows how to enable session-traffic.

{
    "session-traffic": {
        "ipv4-pps": 1,
        "ipv6-pps": 1,
        "ipv6pd-pps": 1
    }
}

{ "isis": {} }

Attribute	Description	Default
instance-id	ISIS instance identifier
level	ISIS level	3
overload	ISIS overload	false
protocol-ipv4	Enable/disable IPv4	true
protocol-ipv6	Enable/disable IPv6	true
level1-auth-key	ISIS level 1 authentication key
level1-auth-type	ISIS level 1 authentication type (simple or md5)	disabled
level2-auth-key	ISIS level 2 authentication key
level2-auth-type	ISIS level 2 authentication type (simple or md5)	disabled
hello-interval	ISIS hello interval in seconds	10
hello-padding	ISIS hello padding	false
holding-time	ISIS holding time in seconds	30
lsp-lifetime	ISIS LSP lifetime in seconds	65535
lsp-refresh-interval	ISIS LSP refresh interval in seconds	300
lsp-retry-interval	ISIS LSP retry interval in seconds	5
lsp-tx-interval	ISIS LSP TX interval in ms (time between LSP send windows)	10
lsp-tx-window-size	ISIS LSP TX window size (LSP send per window)	1
csnp-interval	ISIS CSNP interval in seconds	30
hostname	ISIS hostname	bngblaster
router-id	ISIS router identifier	10.10.10.10
system-id	ISIS system identifier	0100.1001.0010
area	ISIS area(s)	49.0001/24
sr-base	ISIS SR base
sr-range	ISIS SR range
sr-node-sid	ISIS SR node SID
teardown-time	ISIS teardown time in seconds	5

This traffic is generated between the session and a network interface. In case of multiple network interfaces, the preferred network interfaces can be selected using the network-interface option in the corresponding access configuration.

Verification

The final report includes detailed information for session traffic.

Example report output for 100 sessions:

Session Traffic:
Config:
    IPv4    PPS:           1
    IPv6    PPS:           1
    IPv6PD  PPS:           1
Verified Traffic Flows: 3000/3000
    Access  IPv4:        500
    Access  IPv6:        500
    Access  IPv6PD:      500
    Network IPv4:        500
    Network IPv6:        500
    Network IPv6PD:      500
First Sequence Number Received:
    Access  IPv4    MIN:        1 ( 1.000s) MAX:        2 ( 2.000s)
    Access  IPv6    MIN:        2 ( 2.000s) MAX:        2 ( 2.000s)
    Access  IPv6PD  MIN:        2 ( 2.000s) MAX:        2 ( 2.000s)
    Network IPv4    MIN:        1 ( 1.000s) MAX:        2 ( 2.000s)
    Network IPv6    MIN:        2 ( 2.000s) MAX:        2 ( 2.000s)
    Network IPv6PD  MIN:        2 ( 2.000s) MAX:        2 ( 2.000s)

The statistics starting with Access ... correspond to traffic received on the access interface (network->access) where those starting with Network ... correspond to traffic received on the network interface (access->network).

The First Sequence Number Received is used to measure the forwarding convergence. The session traffic starts automatically as soo as the session is established using the rate configured. All traffic flows in the BNG Blaster start with the 64bit sequence number 1. Assuming the first sequence number received for given flow is 5 combined with a rate of 1 PPS would mean that it took between 4 and 5 seconds until forwarding is working.