View source for CSIT/PerfTestPlan/SRv6

__TOC__

== End-to-End use-case: SRv6 L3VPN for IPv6 traffic ==

[[File:SRv6 L3VPN IPv6 traffic.png|x400px]]

In this example what we will do is on C1 create a SR Policy with only one SID list. This SID list will be <C2::, C4::6>. The SR policy will be using encapsulation (insertion is also available).

On C1 I will add an steering policy to steer all the L3 traffic destined to B::/112 via the BindingSID of the SR policy we just created before.

On C2 I will create one SR LocalSID with behavior End. (Endpoint)

On C4 I will create one SR LocalSID with behavior End.DX6 (Endpoint with Decapsulation and IPv6 cross-connect).

Note that this is a L3VPN for all traffic from A:: to B::. In this example the returning path is not shown. The user must create another SR policy at C4 with the appropriate SR LocalSIDs at the different nodes for the returning path.

=== CSIT tests ===
Behaviors to test:

Test 1: (C1) T.Encaps (Transit with Encapsulation in SR policy).
 Input is IPv6 packet with no additional extension headers...i.e. ping to B::
 Output is an IPv6 header, with an SRH containing two segments. Inner IPv6 header (received header) unmodified.

Test 2: (C2) End behavior (Endpoint behavior).
 Input IPv6 packet with SR header. 
 Output: IPv6 DA updated with the next active segment. Segment Left field in the SRH decremented.

Test 3: (C4) End.DX6 (Endpoint with decapsulation and IPv6 cross-connect).
 Input: IPv6 packet with SRH with Segment Left = 0.
 Output: Outer IPv6 header with the SRH removed. Inner IPv6 packet cross-connected to the configured interface.

(C3 is just a transit node doing plain IPv6 routing.)

==== Test 1: T.Encaps ====

TG-SUT1 (C1) – SUT2 – TG

SUT1 is doing the T.Encaps behavior.

SUT2 is doing plain IPv6 forwarding.

TG: sent packet with IPv6 header and payload. Receives a packet with IPv6,SRH,IPv6,Payload.

 vpp# set sr encaps source addr C1::
 vpp# sr policy add bsid C1::999:1 next C2:: next C4::6 encap
 vpp# sr steer l3 B::/112 via sr policy bsid C1::999:1

This configuration can be verified with the CLI:

 vpp# show sr pol
 SR policies:
 [0].-	BSID: c1::999:1
 	Behavior: Encapsulation
 	Type: Default
 	FIB table: 0
 	Segment Lists:
   	[0].- < c2::, c4::6 > weight: 1
 -----------
 vpp# show sr steering policies
 SR steering policies:
 Traffic		SR policy BSID
 L3 b::/112	c1::999:1

Show run:
 DBGvpp# show run
 Time 42.6, average vectors/node 1.00, last 128 main loops 0.00 per node 0.00
   vector rates in 5.6506e1, out 5.6506e1, drop 4.6951e-2, punt 0.0000e0
              Name                 State         Calls          Vectors        Suspends         Clocks       Vectors/Call
 GigabitEthernet0/4/0-output      active               2402            2404               0          2.70e3            1.00
 GigabitEthernet0/4/0-tx          active               2402            2404               0          6.73e4            1.00
 GigabitEthernet0/5/0-output      active                  2               2               0          3.06e3            1.00
 GigabitEthernet0/5/0-tx          active                  2               2               0          5.20e4            1.00
 GigabitEthernet0/7/0-output      active                  1               1               0          5.38e3            1.00
 GigabitEthernet0/7/0-tx          active                  1               1               0          1.55e5            1.00
 api-rx-from-ring                any wait                 0               0               2          1.33e4            0.00
 cdp-input                        active                  1               1               0          1.89e4            1.00
 cdp-process                     any wait                 0               0               8          1.23e4            0.00
 dhcp-client-process             any wait                 0               0               1          8.08e3            0.00
 dpdk-input                       polling          20613046            2407               0          1.55e7            0.00
 dpdk-process                    any wait                 0               0              14          5.99e6            0.00
 error-drop                       active                  2               2               0          1.73e4            1.00
 ethernet-input                   active                  1               1               0          2.15e4            1.00
 fib-walk                        any wait                 0               0           21237          3.27e3            0.00
 gmon-process                    time wait                0               0               9          6.49e3            0.00
 icmp6-neighbor-solicitation      active                  2               2               0          2.85e4            1.00
 icmp6-router-advertisement       active                  1               1               0          2.24e4            1.00
 icmp6-router-solicitation        active                  1               1               0          3.12e4            1.00
 ikev2-manager-process           any wait                 0               0              43          1.04e4            0.00
 interface-output                 active               2404            2406               0          3.72e3            1.00
 ip6-icmp-input                   active                  3               3               0          9.71e3            1.00
 ip6-icmp-neighbor-discovery-ev  any wait                 0               0              43          1.29e4            0.00
 ip6-input                        active               2404            2406               0          7.25e3            1.00
 ip6-load-balance                 active               4802            4806               0          2.30e3            1.00
 ip6-local                        active                  3               3               0          6.51e3            1.00
 ip6-lookup                       active               4804            4808               0          4.22e3            1.00
 ip6-mfib-forward-lookup          active                  1               1               0          1.25e4            1.00
 ip6-mfib-forward-rpf             active                  1               1               0          1.71e4            1.00
 ip6-replicate                    active                  1               1               0          1.72e4            1.00
 ip6-rewrite                      active               2401            2403               0          3.83e3            1.00
 ip6-rewrite-mcast                active                  1               1               0          2.68e4            1.00
 lisp-retry-service              any wait                 0               0              21          1.52e4            0.00
 llc-input                        active                  1               1               0          6.58e3            1.00
 snap-input                       active                  1               1               0          2.52e4            1.00
 '''sr-pl-rewrite-encaps             active               2401            2403               0          4.95e3            1.00'''
 unix-cli-144.254.198.56:61759    active                  0               0              66          5.06e5            0.00
 unix-epoll-input                 polling          20613046               0               0          1.41e3            0.00
 vpe-oam-process                 any wait                 0               0              20          9.42e3            0.00
 vpe-route-resolver-process      any wait                 0               0               1          6.75e3            0.00

==== Test 2: End ====

TG-SUT1 (C2) – SUT2 – TG

SUT1 is doing the End behavior.

SUT2 is doing plain IPv6 forwarding.

TG: sent packet with IPv6, SRH(SL=n), IPv6, Payload. Receives a packet with IPv6(updated DA to next segment),SRH(SL=n-1)Pv6,Payload.
 
 vpp# sr localsid address C2:: behavior end

This configuration can be verified with the CLI:
 vpp# show sr localsid
 SRv6 - My LocalSID Table:
 =========================
 	Address: 	c2::
 	Behavior: 	End
 	Good traffic: 	[0 packets : 0 bytes]
 	Bad traffic:  	[0 packets : 0 bytes]
 --------------------

Show run:
 vpp# show run
 Time 38.9, average vectors/node 1.00, last 128 main loops 0.00 per node 0.00
   vector rates in 6.5538e1, out 6.5512e1, drop 7.7103e-2, punt 0.0000e0
              Name                 State         Calls          Vectors        Suspends         Clocks       Vectors/Call
 GigabitEthernet0/5/0-output      active                  2               2               0          2.11e3            1.00
 GigabitEthernet0/5/0-tx          active                  2               2               0          7.51e4            1.00
 GigabitEthernet0/6/0-output      active               2546            2546               0          8.79e2            1.00
 GigabitEthernet0/6/0-tx          active               2546            2546               0          6.99e4            1.00
 GigabitEthernet0/a/0-output      active                  1               1               0          1.61e3            1.00
 GigabitEthernet0/a/0-tx          active                  1               1               0          1.67e5            1.00
 api-rx-from-ring                any wait                 0               0               2          8.21e3            0.00
 cdp-input                        active                  1               1               0          1.49e4            1.00
 cdp-process                     any wait                 0               0              29          1.69e3            0.00
 dhcp-client-process             any wait                 0               0               1          4.59e3            0.00
 dpdk-input                       polling          62505649            2550               0          1.43e7            0.00
 dpdk-process                    any wait                 0               0              13          9.73e6            0.00
 error-drop                       active                  3               3               0          4.05e3            1.00
 ethernet-input                   active                  1               1               0          5.77e3            1.00
 fib-walk                        any wait                 0               0           39023          8.45e2            0.00 
 gmon-process                    time wait                0               0               8          6.11e3            0.00
 icmp6-neighbor-solicitation      active                  1               1               0          8.68e3            1.00
 icmp6-router-advertisement       active                  2               2               0          3.80e3            1.00
 icmp6-router-solicitation        active                  1               1               0          9.20e3            1.00
 ikev2-manager-process           any wait                 0               0              39          5.79e3            0.00
 interface-output                 active                  1               1               0          3.91e3            1.00
 ip6-icmp-input                   active                  3               3               0          1.98e3            1.00
 ip6-icmp-neighbor-discovery-ev  any wait                 0               0              39          6.85e3            0.00
 ip6-input                        active               2549            2549               0          2.79e3            1.00
 ip6-load-balance                 active               2546            2546               0          6.16e2            1.00
 ip6-local                        active                  3               3               0          1.94e3            1.00
 '''ip6-lookup                       active               5093            5093               0          1.07e3            1.00'''
 ip6-mfib-forward-lookup          active                  2               2               0          3.42e3            1.00
 ip6-mfib-forward-rpf             active                  2               2               0          3.81e3            1.00
 ip6-replicate                    active                  2               2               0          2.92e3            1.00
 ip6-rewrite                      active               2546            2546               0          8.49e2            1.00
 ip6-rewrite-mcast                active                  1               1               0          3.58e3            1.00
 lisp-retry-service              any wait                 0               0              20          7.52e3            0.00
 llc-input                        active                  1               1               0          3.12e3            1.00
 snap-input                       active                  1               1               0          9.84e3            1.00
 '''sr-localsid                      active               2546            2546               0          8.92e2            1.00'''
 unix-cli-144.254.198.56:61896    active                  0               0             102          2.75e5            0.00
 unix-epoll-input                 polling          62505649               0               0          6.45e2            0.00
 vpe-oam-process                 any wait                 0               0              20          5.41e3            0.00

==== Test 3: End.DX6 ====

TG-SUT1 (C2) – SUT2 – TG

SUT1 is doing the End.DX6 behavior. (decapsulation with IPv6 cross-connect)

SUT2 is doing plain IPv6 forwarding.

TG: sent packet with IPv6, SRH(SL=0), IPv6, Payload. Receives a packet with IPv6,Payload.

 vpp# sr localsid address C4::6 behavior end.dx6 GigabitEthernet0/5/0 B:C5::B
 vpp# show sr localsid
 SRv6 - My LocalSID Table:
 =========================
 	Address: 	c4::6
 	Behavior: 	DX6 (Endpoint with decapsulation and IPv6 cross-connect)
 	Iface:  	GigabitEthernet0/5/0
 	Next hop: 	b:c5::b
 	Good traffic: 	[6686 packets : 678832 bytes]
 	Bad traffic:  	[0 packets : 0 bytes]
 --------------------

Show run:
 DBGvpp# show run
 Time 32.5, average vectors/node 1.00, last 128 main loops 0.00 per node 0.00
   vector rates in 8.3034e1, out 8.3034e1, drop 0.0000e0, punt 0.0000e0
              Name                 State         Calls          Vectors        Suspends         Clocks       Vectors/Call
 GigabitEthernet0/5/0-output      active               2695            2695               0          2.86e3            1.00
 GigabitEthernet0/5/0-tx          active               2695            2695               0          9.41e4            1.00
 api-rx-from-ring                any wait                 0               0               2          1.38e4            0.00
 cdp-process                     any wait                 0               0               9          4.41e3            0.00
 dhcp-client-process             any wait                 0               0               1          1.01e4            0.00
 dpdk-input                       polling          32857948            2695               0          9.16e6            0.00
 dpdk-process                    any wait                 0               0              11          3.41e6            0.00
 fib-walk                        any wait                 0               0           32293          3.24e3            0.00
 gmon-process                    time wait                0               0               6          9.53e3            0.00
 ikev2-manager-process           any wait                 0               0              33          1.15e4            0.00
 interface-output                 active               2695            2695               0          3.89e3            1.00
 ip6-icmp-neighbor-discovery-ev  any wait                 0               0              32          1.19e4            0.00
 ip6-input                        active               2695            2695               0          7.15e3            1.00
 ip6-lookup                       active               2695            2695               0          6.77e3            1.00
 ip6-rewrite                      active               2695            2695               0          4.31e3            1.00
 lisp-retry-service              any wait                 0               0              16          1.66e4            0.00
 '''sr-localsid-d                    active               2695            2695               0          4.57e3            1.00'''
 unix-cli-144.254.198.56:61894    active                  0               0              96          3.45e5            0.00
 unix-epoll-input                 polling          32857948               0               0          7.23e2            0.00
 vpe-oam-process                 any wait                 0               0              16          9.72e3            0.00
 vpe-route-resolver-process      any wait                 0               0               1          5.71e3            0.00