tools/testing/selftests/net/srv6_hl2encap_red_l2vpn_test.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/srv6_hl2encap_red_l2vpn_test.sh

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System
Linux kernel
Corpus path
tools/testing/selftests/net/srv6_hl2encap_red_l2vpn_test.sh
Extension
.sh
Size
20209 bytes
Lines
781
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# author: Andrea Mayer <andrea.mayer@uniroma2.it>
#
# This script is designed for testing the SRv6 H.L2Encaps.Red behavior.
#
# Below is depicted the IPv6 network of an operator which offers L2 VPN
# services to hosts, enabling them to communicate with each other.
# In this example, hosts hs-1 and hs-2 are connected through an L2 VPN service.
# Currently, the SRv6 subsystem in Linux allows hosts hs-1 and hs-2 to exchange
# full L2 frames as long as they carry IPv4/IPv6.
#
# Routers rt-1,rt-2,rt-3 and rt-4 implement L2 VPN services
# leveraging the SRv6 architecture. The key components for such VPNs are:
#
#   i) The SRv6 H.L2Encaps.Red behavior applies SRv6 Policies on traffic
#      received by connected hosts, initiating the VPN tunnel. Such a behavior
#      is an optimization of the SRv6 H.L2Encap aiming to reduce the
#      length of the SID List carried in the pushed SRH. Specifically, the
#      H.L2Encaps.Red removes the first SID contained in the SID List (i.e. SRv6
#      Policy) by storing it into the IPv6 Destination Address. When a SRv6
#      Policy is made of only one SID, the SRv6 H.L2Encaps.Red behavior omits
#      the SRH at all and pushes that SID directly into the IPv6 DA;
#
#  ii) The SRv6 End behavior advances the active SID in the SID List
#      carried by the SRH;
#
# iii) The SRv6 End.DX2 behavior is used for removing the SRv6 Policy
#      and, thus, it terminates the VPN tunnel. The decapsulated L2 frame is
#      sent over the interface connected with the destination host.
#
#               cafe::1                      cafe::2
#              10.0.0.1                     10.0.0.2
#             +--------+                   +--------+
#             |        |                   |        |
#             |  hs-1  |                   |  hs-2  |
#             |        |                   |        |
#             +---+----+                   +--- +---+
#    cafe::/64    |                             |      cafe::/64
#  10.0.0.0/24    |                             |    10.0.0.0/24
#             +---+----+                   +----+---+
#             |        |  fcf0:0:1:2::/64  |        |
#             |  rt-1  +-------------------+  rt-2  |
#             |        |                   |        |
#             +---+----+                   +----+---+
#                 |      .               .      |
#                 |  fcf0:0:1:3::/64   .        |
#                 |          .       .          |
#                 |            .   .            |
# fcf0:0:1:4::/64 |              .              | fcf0:0:2:3::/64
#                 |            .   .            |
#                 |          .       .          |
#                 |  fcf0:0:2:4::/64   .        |
#                 |      .               .      |
#             +---+----+                   +----+---+
#             |        |                   |        |
#             |  rt-4  +-------------------+  rt-3  |
#             |        |  fcf0:0:3:4::/64  |        |
#             +---+----+                   +----+---+
#
#
# Every fcf0:0:x:y::/64 network interconnects the SRv6 routers rt-x with rt-y
# in the IPv6 operator network.
#
# Local SID table
# ===============
#
# Each SRv6 router is configured with a Local SID table in which SIDs are
# stored. Considering the given SRv6 router rt-x, at least two SIDs are

Annotation

Implementation Notes