Hybrid Openflow Switch Traffic Steering Details; Redirect To Lsp; Figure 27: Openflow Switch Embedding In Ingress Pipeline Processing - Alcatel-Lucent 7750 SR-OS Configuration Manual

Hybrid OpenFlow Switch Traffic Steering Details

As described in the previous section, an update to an OpenFlow Switch's flow table, results in the
embedded filter update(s), which triggers update to all filter policies embedding those filters. The
router automatically downloads the new set of rules to the line cards as defined through service
configuration. The rules became part of ingress line card pipeline as depicted by the below picture:
Intf
Ingress
Port
Interface
Table

Figure 27: OpenFlow Switch Embedding in Ingress Pipeline Processing

Redirect to LSP

The router supports traffic steering to an LSP. The following details the OF encoding to be used by
an OF controller:
flow_mod: instruction=write_action, action=output_port, port=LOGICAL
where:
LOGICAL
0
100
logical port, the second octet indicates the platform's tunnel (set to all 0's), and the remaining two
octets encode LSP identifier:
MPLS-TP.
A received LSP in a flow rule is compared against those in the H-OFS logical port table, if the
table does not contain the LSP the rule programming fails. Otherwise, the rule is installed in an
ACL filter. As long as any path within the LSP is UP, the redirect rule will forward unicast IP(v6)
traffic on the currently used best LSP path by adding LSP transport label and, in case of IPv6
traffic, additionally adding explicit NULL label.
7750 SR OS Router Configuration Guide
Ingress Line Card Pipe-line Processing
ACL OF
Rules Switch
Flow
Table
IP Filter Policy Table (IPv4 or IPv6)
port encodes an LSP follows:
0000 0000 0000 xxxx xxxx xxxx xxxx
TunnelID
Hybrid
ACL QoS
Rules Policy
QoS Table Tunnel/
Routing
, where the first octet indicates the router's
for RSVP-TE (static or dynamic) or
Open Flow Switching
Rtg QoS/TM
Fwd
Egress
Port
Queuing
Policing
al_0369
Tunnel Number
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