Hi Pablo,
According to the following configs, since the SRv6 SID is not an interface
address, VPP1: sr policy add bsid 1::1:999 next 2::2 next 3::3 , how to find
VPP2 2::2？ The packets could not find the next-hop and out-if.
trace in VPP1:
00:20:47:954483: af-packet-input
af_packet: hw_if_index 2 next-index 4
tpacket2_hdr:
status 0x20000001 len 98 snaplen 98 mac 66 net 80
sec 0x5a59a8b5 nsec 0x287052ff vlan 0
00:20:47:954525: ethernet-input
IP6: 00:22:12:66:00:33 -> 00:0c:29:4d:af:b5
00:20:47:954649: ip6-input
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
00:20:47:954664: ip6-lookup
fib 0 dpo-idx 20 flow hash: 0x00000000
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
00:20:47:954687: ip6-load-balance
fib 0 dpo-idx 20 flow hash: 0x00000000
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
00:20:47:954695: sr-pl-rewrite-encaps
SR-policy-rewrite: src 1::1 dst 2::2
00:20:47:954709: ip6-lookup
fib 0 dpo-idx 1 flow hash: 0x00000000
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 64, payload length 124
00:20:47:954714: ip6-drop
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 64, payload length 124
00:20:47:954729: error-drop
ethernet-input: no error
Thanks，
Xyxue
From: Pablo Camarillo (pcamaril)
Date: 2018-01-12 18:53
To: 薛欣颖; vpp-dev
Subject: Re: [vpp-dev] problem in SRV6
Hi Xyxue,
The SRv6 SID is not an interface address. Hence creating the loopback
interfaces and adding the SID address on the loopback is not necessary.
Find below some corrected configs. (you were also missing the config on VPP3).
Thanks.
Cheers,
Pablo.
From: 薛欣颖 <xy...@fiberhome.com>
Date: Friday, 12 January 2018 at 09:19
To: "Pablo Camarillo (pcamaril)" <pcama...@cisco.com>, vpp-dev
<vpp-dev@lists.fd.io>
Subject: Re: Re: [vpp-dev] problem in SRV6
Hi Pablo,
My configuration and the trace info is shown below:
VPP1：
create host-interface name eth0 mac 00:0c:29:4d:af:8d
create host-interface name eth4 mac 00:0c:29:4d:af:b5
set interface state host-eth0 up
set interface state host-eth4 up
enable ip6 interface host-eth0
set interface ip address host-eth0 a::1/64
enable ip6 interface host-eth4
set interface ip address host-eth4 2001::1/64
create loopback interface instance 0
set interface state loop0 up
set interface ip address loop0 1::1/128
ip route add 2::2/128 via ip6-address a::2 host-eth0
ip route add 3::3/128 via ip6-address a::2 host-eth0
ip route add b::1/64 via ip6-address a::2 host-eth0
set sr encaps source addr 1::1
sr policy add bsid 1::1:999 next 2::2 next 3::3
sr steer l3 2003::1/64 via sr policy bsid 1::1:999
trace:
02:01:10:720008: af-packet-input
af_packet: hw_if_index 3 next-index 4
tpacket2_hdr:
status 0x20000001 len 98 snaplen 98 mac 66 net 80
sec 0x5a571037 nsec 0x28091fb7 vlan 0
02:01:10:720040: ethernet-input
IP6: 00:22:12:66:00:33 -> 00:0c:29:4d:af:b5
02:01:10:720068: ip6-input
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
02:01:10:720075: ip6-lookup
fib 0 dpo-idx 35 flow hash: 0x00000000
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
02:01:10:720085: ip6-load-balance
fib 0 dpo-idx 35 flow hash: 0x00000000
ICMP6: 2001::5 -> 2003::5
tos 0x00, flow label 0x0, hop limit 64, payload length 44
ICMP echo_request checksum 0xa6e8
02:01:10:720089: sr-pl-rewrite-encaps
SR-policy-rewrite: src 1::1 dst 2::2
02:01:10:720096: ip6-lookup
fib 0 dpo-idx 9 flow hash: 0x00000000
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 64, payload length 140
02:01:10:720097: ip6-rewrite
tx_sw_if_index 1 adj-idx 9 : ipv6 via a::2 host-eth0:
000c29198e58000c294daf8d86dd flow hash: 0x00000000
00000000: 000c29198e58000c294daf8d86dd60000000008c2b3f00010000000000000000
00000020: 0000000000010002000000000000000000000000000229060402020000002003
00000040: 0000000000000000000000000005000300000000000000000000000000030002
00000060: 000000000000000000000000000260000000002c3a3f200100000000
02:01:10:720103: host-eth0-output
host-eth0
IP6: 00:0c:29:4d:af:8d -> 00:0c:29:19:8e:58
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 140
VPP2：
create host-interface name eth0 mac 00:0c:29:19:8e:58
create host-interface name eth2 mac 00:0c:29:19:8e:6c
set interface state host-eth0 up
set interface state host-eth2 up
enable ip6 interface host-eth0
enable ip6 interface host-eth2
set interface ip address host-eth0 a::2/64
set interface ip address host-eth2 b::1/64
create loopback interface instance 0
set interface state loop0 up
set interface ip address loop0 2::2/128
ip route add 1::1/128 via ip6-address a::1 host-eth0
ip route add 3::3/128 via ip6-address b::2 host-eth2
sr localsid address 2::2 behavior end
trace:
00:08:01:715943: af-packet-input
af_packet: hw_if_index 1 next-index 4
tpacket2_hdr:
status 0x20000001 len 178 snaplen 178 mac 66 net 80
sec 0x5a571fb9 nsec 0x2c338c0a vlan 0
00:08:01:715969: ethernet-input
IP6: 00:0c:29:4d:af:8d -> 00:0c:29:19:8e:58
00:08:01:716017: ip6-input
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716022: ip6-lookup
fib 0 dpo-idx 13 flow hash: 0x00000000
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716030: ip6-local
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716037: ip6-punt
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716044: error-punt
ip6-input: unknown ip protocol
VPP3：
create host-interface name eth2 mac 00:0c:29:a6:67:7c
create host-interface name eth5 mac 00:0c:29:a6:67:9a
set interface state host-eth2 up
set interface state host-eth5 up
enable ip6 interface host-eth2
enable ip6 interface host-eth5
set interface ip address host-eth2 b::2/64
set interface ip address host-eth5 2003::1/64
create loopback interface instance 0
set interface state loop0 up
set interface ip address loop0 3::3/128
ip route add 2::2/128 via ip6-address b::1 host-eth2
ip route add 1::1/128 via ip6-address b::1 host-eth2
ip route add a::1/64 via ip6-address b::1 host-eth2
sr localsid address 3::3 behavior end.dx6 host-eth5 <IP_address_TC2> Note(I
assume host-eth5 is the oif towards TC2. Im missing the IP address of TC2.)
Thanks,
Xyxue
From: Pablo Camarillo (pcamaril)
Date: 2018-01-12 15:56
To: 薛欣颖; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] problem in SRV6
Hi Xyxue,
What is your entire config at VPP2? Looks like a misconfiguration in VPP2.
Thanks,
Pablo.
From: <vpp-dev-boun...@lists.fd.io> on behalf of 薛欣颖 <xy...@fiberhome.com>
Date: Friday, 12 January 2018 at 02:04
To: "vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io>
Subject: [vpp-dev] problem in SRV6
Hi guys,
I'm testing SRV6 ,there is a problem: the packet was dropped in the vpp2. More
info and the configuration is shown below:
TC1-VPP1-VPP2-VPP3-TC2
VPP1:
the host-eth1、host-eth2 ipv6 address 1::1 、 2::2, create a loop int 3::3 , add
the static routing.
set sr encaps source addr 1::1
sr policy add bsid 1::1:999 next 2::2 next 3::3
sr steer l3 2003::1/64 via sr policy bsid 1::1:999
VPP# show sr policies
SR policies:
[0].- BSID: 1::1:999
Behavior: Encapsulation
Type: Default
FIB table: 0
Segment Lists:
[0].- < 2::2, 3::3 > weight: 1
The packet DIP = 2003::5 could match the sr, the trace info is correct.
VPP2:
sr localsid address 2::2 behavior end
trace info:
00:08:01:715943: af-packet-input
af_packet: hw_if_index 1 next-index 4
tpacket2_hdr:
status 0x20000001 len 178 snaplen 178 mac 66 net 80
sec 0x5a571fb9 nsec 0x2c338c0a vlan 0
00:08:01:715969: ethernet-input
IP6: 00:0c:29:4d:af:8d -> 00:0c:29:19:8e:58
00:08:01:716017: ip6-input
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716022: ip6-lookup
fib 0 dpo-idx 13 flow hash: 0x00000000
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716030: ip6-local
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716037: ip6-punt
IPV6_ROUTE: 1::1 -> 2::2
tos 0x00, flow label 0x0, hop limit 63, payload length 124
00:08:01:716044: error-punt
ip6-input: unknown ip protocol
Is there any problem in my configuration?
Thanks,
Xyxue
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