IETF 115 SRv6 Data Plane Visibility

1. SRv6 Data-Plane
Visibility
OPSAWG WG
IETF 115
July 5-6th, 2022
Hackathon

2. Hackathon - Plan
• Establish multivendor SRv6 network topology with network
telemetry data collection and processing pipeline.
• Validate and visualize two IPFIX implementations of draft-ietf-
opsawg-ipfix-srv6-srh in FD.io VPP and on Huawei VRP.
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3. Hackathon – Network (1/2)
4
• SRv6 network
topology with two
vendors and IPFIX
data processing
pipeline.
• Huawei with four P
and two PE nodes
exposing SRH
provider data-plane
as described in draft-
ietf-opsawg-ipfix-
srv6-srh.
• Cisco with two PE
nodes exposing
customer data-plane.
192.0.2.0/24 2a02:a90:4007:700 (VLAN 500)
.154
.157 .159
ipf-zbl1325-srv6lab-al-57
Lo0: 198.51.100.157
2001:DB8:6::1/128
SRv6 Locator: 2001:DB8:10:: 64/48
ipf-zbl1325-srv6lab-ms-58
Lo0: 2001:DB8:7::1/128
SRv6 Locator: 2001:DB8:17:: 64/48
ipf-zbl1325-srv6lab-ipcore-91
Lo0: 198.51.100.191
2001:db8:2::1/128
SRv6 Locator: 2001:db8:2::/48
ipf-zbl1325-srv6lab-ml-59
Lo0: 2001:DB8:8::1/128
SRv6 Locator: 2001:DB8:18:: 64/48
.155
.158
ietf-internal (Collector)
MGMT: 10.212.252.10
ens42.523
203.0.113.46/28
2001:db8:f:3::ffff/64
ens42.524
203.0.113.30/28
2001:db8:f:2::ffff/64
VRF-A10
RD: 65536:190
SRv6 SID: 2001:db8:1:0:40::
TenGigE0/0/0/0.524: 203.0.113.18/28
2001:db8:f:2::18/64
Lo10: 203.0.113.190/32
2001:db8:f::190/128
VRF-A10
RD: 65536:191
SRv6 SID: 2001:db8:2:0:40::
TenGigE0/0/0/0.524: 203.0.113.19/28
2001:db8:f:2::19/64
Lo10: 203.0.113.191/32
2001:db8:f::191/128
.156 .190
.191
203.0.113.16/28 2001:db8:f:2::/64 (VLAN 524)
VRF-A10
RD: 65536:157
SRv6 SID: 2001:db8:10:0:124::
GigabitEthernet0/7/0.523: 203.0.113.35/28
2001:2:1::35/64
Lo10: 203.0.113.157/32
2001:DB8:F::157/128
203.0.113.32/28 2001:db8:f:3::/64 (VLAN 523)
VRF-A10
RD: 65536:154
SRv6 SID: 2001:db8:9:0:124::
GigabitEthernet0/7/0.523: 203.0.113.34/28
2001:2:1::34/64
Lo10: 203.0.113.154/32
2001:DB8:F::154/128
MP-iBGP
ens224
192.0.2.1/24
2a02:a90:4007:700::1/64
ipf-zbl1327-srv6lab-al54
Lo0: 198.51.100.154
2001:DB8:3::1/128
SRv6 Locator: 2001:DB8:9:: 64/48
ipf-zbl1327-srv6lab-ms-55
Lo0: 2001:DB8:4::1/128
SRv6 Locator: 2001:DB8:14:: 64/48
ipf-zbl1327-srv6lab-ml-56
Lo0: 2001:DB8:5::1/128
SRv6 Locator: 2001:DB8:15:: 64/48
ipf-zbl1327-srv6lab-ipcore-90
Lo0: 198.51.100.190
2001:db8:1::1/128
SRv6 Locator: 2001:db8:1::/48
IPFIX 2a02:a90:4007::2:1/128
BMP 2a02:a90:4007::4:2/128
100GE1/0/4
400GE1/0/0
400GE2/0/0
100GE2/0/4
100GE0/5/0 100GE2/0/4
100GE1/0/4
400GE1/0/0
400GE2/0/0
100GE2/0/4
100GE1/0/4
100GE1/0/4
400GE2/0/0
400GE1/0/0
100GE2/0/4
400GE1/0/0
400GE2/0/0
SRv6 TE
Policy with
SID List 1..3

4. Hackathon – Network (2/2)
• FD.io VPP Open Source Code published: https://github.com/insa-unyte/vpp-srh-onpath-telemetry

5. (1) With Segment List
Section we can select
the traffic
engineered path.
(2) Segments Left shows
where we are in the
forwarding path.
(3) Active Segment
where we forward
next to.
(4) Peer IP Src from
where the metrics
were exported.
1
2 3 4
Visualization

6. Conclusion
Achievements
• Running SRv6 multivendor network topology with traffic engineering
• Validating two interoperable implementations of draft-ietf-opsawg-ipfix-srv6-srh
• Decompose srhSegmentIPv6ListSection in pmacct data collection
• Suddenly realizing that on one desk we are changing a
traffic engineered path and on the other desk observing
the change in the observed path.
Next Steps
• Adding support for draft-tgraf-opsawg-ipfix-on-path-telemetry in VPP
• Validate customer data-plane visibility in SRv6 for L2 and L3 EVPN
• Posting new draft version with minor updates today
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7. What we learned (again)
•Good
• Thanks to our hackathon neighbors, our
crowded hackathon group could slowly
invade their tables to obtain power and space.
• As always… the beers were most welcome!
•Bad
• Lab access was trickier to troubleshoot then the IPFIX
implementation we planned to.
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8. Thanks to…
• Alex Huang Feng – INSA
• Pierre Francois – INSA
• Severin Dellsperger - OST University
• Urs Baumann - OST University
• Paolo Lucente – NTT
• Benoit Claise – Huawei
• Michael Mackey - Huawei
• Jean Quilbeuf - Huawei
• Olga Havel – Huawei
• Marco Tollini - Swisscom
• Yannick Buchs – Swisscom
• Ahmed Elhassany - Swisscom
• Thomas Graf - Swisscom
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….and Huawei, INSA Lyon and Pmacct for the network
environment, software and test cases.