| Nathan Skrzypczak | d4a7064 | 2021-10-08 14:01:27 +0200 | [diff] [blame^] | 1 | .. _srv6_steering_doc: |
| 2 | |
| 3 | Steering packets into a SR Policy |
| 4 | ================================= |
| 5 | |
| 6 | steer packets using the sr steering policy |
| 7 | ------------------------------------------ |
| 8 | |
| 9 | To steer packets in Transit into an SR policy (T.Insert, T.Encaps and |
| 10 | T.Encaps.L2 behaviors), the user needs to create an ‘sr steering |
| 11 | policy’. |
| 12 | |
| 13 | :: |
| 14 | |
| 15 | sr steer l3 2001::/64 via index 1 |
| 16 | sr steer l3 2001::/64 via bsid cafe::1 |
| 17 | sr steer l3 2001::/64 via bsid cafe::1 fib-table 3 |
| 18 | sr steer l3 10.0.0.0/16 via bsid cafe::1 |
| 19 | sr steer l2 TenGE0/1/0 via bsid cafe::1 |
| 20 | |
| 21 | Disclaimer: The T.Encaps.L2 will steer L2 frames into an SR Policy. |
| 22 | Notice that creating an SR steering policy for L2 frames will actually |
| 23 | automatically *put the interface into promiscous mode*. |
| 24 | |
| 25 | steer packets using the classifier |
| 26 | ---------------------------------- |
| 27 | |
| 28 | Another way to steer packet is to use the classifier. |
| 29 | |
| 30 | First the user need to manually add the source routing node to the list |
| 31 | of the ip6-inacl next nodes. Using the python api this can be done |
| 32 | with: |
| 33 | |
| 34 | :: |
| 35 | |
| 36 | # jsonfiles = get list of json api files |
| 37 | vpp = VPP(jsonfiles) |
| 38 | vpp.add_node_next(node_name='ip6-inacl', next_name='sr-pl-rewrite-insert') |
| 39 | |
| 40 | Below is a classifier mask filtering all the packets from the interface |
| 41 | TenGigabitEthernet5/0/0 on ip version and moving all ipv6 packets to the |
| 42 | sr-pl-rewrite-insert node (dropping the others) and applying the source |
| 43 | routing index 2. In essence, this means “apply this sr policy to all the |
| 44 | packets from this interface) |
| 45 | |
| 46 | :: |
| 47 | |
| 48 | vpp# classify table miss-next 0 current-data-flag 1 mask hex f000000000000000 skip 0 |
| 49 | vpp# classify session acl-hit-next 1 table-index 0 match hex 6000000000000000 action set-sr-policy-index 2 |
| 50 | vpp# set interface input acl intfc TenGigabitEthernet5/0/0 ip6-table 0 |