Hi ,
I am trying ipv6 ping .It is not working when ip6 classifier is configured.
Reason of non-working case from below traces ,seems classify gets attached
for icmpv6 packets and since no rule is to handle v6 classifier ping
doesn't work. Any clue how this can be changed to work?
non-working case trace :
00:03:31:436323: dpdk-input
GigabitEthernet1/0/0 rx queue 0
buffer 0x4d19: current data 14, length 72, free-list 0, clone-count 0,
totlen-nifb 0, trace 0x3
ext-hdr-valid
l4-cksum-computed l4-cksum-correct l2-hdr-offset 0
l3-hdr-offset 14
PKT MBUF: port 0, nb_segs 1, pkt_len 86
buf_len 2176, data_len 86, ol_flags 0x180, data_off 128, phys_addr
0xff9346c0
packet_type 0x41 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
Packet Offload Flags
PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid
PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
Packet Types
RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
RTE_PTYPE_L3_IPV6 (0x0040) IPv6 packet without extension headers
IP6: 54:ab:3a:79:85:40 -> 54:ab:3a:da:66:1f
ICMP6: fe80::311d:805e:fe6f:6d12 -> 2001::1
tos 0x00, flow label 0x0, hop limit 255, payload length 32
ICMP neighbor_solicitation checksum 0x7bc
target address 2001::1
00:03:31:436330: ip6-input
ICMP6: fe80::311d:805e:fe6f:6d12 -> 2001::1
tos 0x00, flow label 0x0, hop limit 255, payload length 32
ICMP neighbor_solicitation checksum 0x7bc
target address 2001::1
00:03:31:436335: ip6-lookup
fib 0 dpo-idx 0 flow hash: 0x00000000
ICMP6: fe80::311d:805e:fe6f:6d12 -> 2001::1
tos 0x00, flow label 0x0, hop limit 255, payload length 32
ICMP neighbor_solicitation checksum 0x7bc
target address 2001::1
00:03:31:436337: ip6-classify
IP_CLASSIFY: next_index 0, table 0, entry -1
00:03:31:436340: ip6-drop
ICMP6: fe80::311d:805e:fe6f:6d12 -> 2001::1
tos 0x00, flow label 0x0, hop limit 255, payload length 32
ICMP neighbor_solicitation checksum 0x7bc
target address 2001::1
00:03:31:436345: error-drop
dpdk-input: no error
Non-working case fib entries:
DBGvpp# show ip6 fib
ipv6-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ]
locks:[src:default-route:1, ]
::/0
unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:6 buckets:1 uRPF:5 to:[1:168]]
[0] [@0]: dpo-drop ip6
2001::/64
unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:9 buckets:1 uRPF:8 to:[0:0]]
[0] [@4]: ipv6-glean: GigabitEthernet1/0/0: mtu:9202
ffffffffffff54ab3ada661f86dd
2001::1/128
unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:10 buckets:1 uRPF:17 to:[5:424]]
[0] [@17]: ip6-classify:[0]:table:0
2001::2/128
unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:14 buckets:1 uRPF:9 to:[1:104]]
[0] [@5]: ipv6 via 2001::2 GigabitEthernet1/0/0: mtu:9202
54ab3a79854054ab3ada661f86dd
fe80::/10
unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:7 buckets:1 uRPF:6 to:[0:0]]
[0] [@13]: ip6-link-local
-------------------------------------------------------------------------------------------
DBGvpp# show ip6 fib 2001::1/128 verbose
ipv6-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ]
locks:[src:default-route:1, ]
2001::1/128 fib:0 index:8 locks:3
src:classify refs:1 src-flags:added,contributing,active,
path-list:[19] locks:2 uPRF-list:17 len:0 itfs:[]
path:[23] pl-index:19 ip6 weight=1 pref=0 exclusive:
oper-flags:resolved,
[@0]: ip6-classify:[0]:table:0
src:interface refs:1 entry-flags:connected,local, src-flags:added,
cover:-1
path-list:[14] locks:1 flags:local, uPRF-list:11 len:0 itfs:[]
path:[14] pl-index:14 ip6 weight=1 pref=0 receive:
oper-flags:resolved, cfg-flags:local,
[@0]: dpo-receive: 2001::1 on GigabitEthernet1/0/0
forwarding: unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:10 buckets:1 uRPF:17 to:[5:424]]
[0] [@17]: ip6-classify:[0]:table:0
----------------------------------------------------------------------------------------------------
Working case traces:
00:01:10:583987: dpdk-input
GigabitEthernet1/0/0 rx queue 0
buffer 0x4db5: current data 14, length 104, free-list 0, clone-count 0,
totlen-nifb 0, trace 0x4
ext-hdr-valid
l4-cksum-computed l4-cksum-correct l2-hdr-offset 0
l3-hdr-offset 14
PKT MBUF: port 0, nb_segs 1, pkt_len 118
buf_len 2176, data_len 118, ol_flags 0x180, data_off 128, phys_addr
0xff936dc0
packet_type 0x41 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
Packet Offload Flags
PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid
PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
Packet Types
RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
RTE_PTYPE_L3_IPV6 (0x0040) IPv6 packet without extension headers
IP6: 54:ab:3a:79:85:40 -> 54:ab:3a:da:66:1f
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586196: ip6-input
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586204: ip6-lookup
fib 0 dpo-idx 6 flow hash: 0x00000000
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586210: ip6-local
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586216: ip6-icmp-input
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586218: ip6-icmp-echo-request
ICMP6: 2001::2 -> 2001::1
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_request checksum 0x9763
00:01:10:586220: ip6-lookup
fib 0 dpo-idx 2 flow hash: 0x00000000
ICMP6: 2001::1 -> 2001::2
tos 0x00, flow label 0xb1cd2, hop limit 64, payload length 64
ICMP echo_reply checksum 0x9663
00:01:10:586223: ip6-rewrite
tx_sw_if_index 1 adj-idx 2 : ipv6 via 2001::2 GigabitEthernet1/0/0:
mtu:9202 54ab3a79854054ab3ada661f86dd flow hash: 0x00000000
00000000: 54ab3a79854054ab3ada661f86dd600b1cd200403a3f20010000000000000000
00000020: 0000000000012001000000000000000000000000000281009663615d00019dac
00000040: c25a0000000019e40e0000000000101112131415161718191a1b1c1d1e1f2021
00000060: 22232425262728292a2b2c2d2e2f3031323334353637ee7d14b40000
00:01:10:586226: GigabitEthernet1/0/0-output
GigabitEthernet1/0/0
IP6: 54:ab:3a:da:66:1f -> 54:ab:3a:79:85:40
ICMP6: 2001::1 -> 2001::2
tos 0x00, flow label 0xb1cd2, hop limit 63, payload length 64
ICMP echo_reply checksum 0x9663
00:01:10:586231: GigabitEthernet1/0/0-tx
GigabitEthernet1/0/0 tx queue 1
buffer 0x4db5: current data 0, length 118, free-list 0, clone-count 0,
totlen-nifb 0, trace 0x4
ext-hdr-valid
l4-cksum-computed l4-cksum-correct l2-hdr-offset 0
l3-hdr-offset 14
PKT MBUF: port 0, nb_segs 1, pkt_len 118
buf_len 2176, data_len 118, ol_flags 0x180, data_off 128, phys_addr
0xff936dc0
packet_type 0x41 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
Packet Offload Flags
PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid
PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
Packet Types
RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
RTE_PTYPE_L3_IPV6 (0x0040) IPv6 packet without extension headers
IP6: 54:ab:3a:da:66:1f -> 54:ab:3a:79:85:40
ICMP6: 2001::1 -> 2001::2
tos 0x00, flow label 0xb1cd2, hop limit 63, payload length 64
ICMP echo_reply checksum 0x9663
Fib entries :
DBGvpp# show ip6 fib 2001::1/128
ipv6-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ]
locks:[src:default-route:1, ]
2001::1/128 fib:0 index:8 locks:2
src:interface refs:1 entry-flags:connected,local,
src-flags:added,contributing,active, cover:7
path-list:[14] locks:2 flags:local, uPRF-list:11 len:0 itfs:[]
path:[14] pl-index:14 ip6 weight=1 pref=0 receive:
oper-flags:resolved, cfg-flags:local,
[@0]: dpo-receive: 2001::1 on GigabitEthernet1/0/0
forwarding: unicast-ip6-chain
[@0]: dpo-load-balance: [proto:ip6 index:10 buckets:1 uRPF:11 to:[0:0]]
[0] [@2]: dpo-receive: 2001::1 on GigabitEthernet1/0/0
Regards,
Bindiya
