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NAT64 DROPS COMING FROM IPV6 TO IPV4

shaileshtata1
Level 1
Level 1

***Configuration on Bridge Domain  for NAT64 on IR8340 *************

interface BDI1
ip address 9.1.1.2 255.255.255.0
ipv6 address 3001:11:0:1::1/64
ipv6 enable
encapsulation dot1Q 11
nat64 enable
end

nat64 prefix stateful 3001::/96
nat64 v4v6 static 9.1.1.3 3001::960B:202
nat64 v4v6 static 150.11.2.2 2001::960B:201
nat64 v6v4 static 2001:11:0:1::2 150.11.7.2
nat64 v6v4 static 3001:11:0:1::2 9.1.7.2

drops coming although intermittent ping happening from IPv6 to IPv6 translation of IPv4 device.

IR8340#sh nat64 statistics int bdi1
NAT64 Statistics

Interface Statistics
BDI1 (IPv4 configured, IPv6 configured):
Packets translated (IPv4 -> IPv6)
Stateless: 0
Stateful: 234
nat46: 0
MAP-T: 0
MAP-E: 0
Packets translated (IPv6 -> IPv4)
Stateless: 0
Stateful: 220
nat46: 0
MAP-T: 0
MAP-E: 0
Packets dropped: 16

following drops messages are coming 

IR8340#sh platform hardware qfp active feature nat64 datapath statistics
non-extended 4 statics 4 ext_binds 0
v6v4 xlated pkts 689
v4v6 xlated pkts 703
NAT46 v4v6 xlated pkts 0
NAT46 v6v4 xlated pkts 0
generated tcp csum 0
generated udp csum 0
Proxy Stats ipc retry fail 0
Alias: add 0 del 0 add_fail 0 del_fail 0
nat64_v6tov4_pkts 0 nat64_v4tov6_pkts 0 nat64_fbd_hits 0
NAT64_DROP_SC_PROCESS_V6_ERR 317
NAT64_DROP_SC_CLASSIFY_V6V4_FAIL 317
NAT64_DROP_SC_NO_N64_SB 6

if anyone know the reason or cause please help ?? urgent help required.

16 Replies 16

shaileshtata1
Level 1
Level 1

Finally the issue was resolved.

Config was perfectly fine.

The issue was IPv6 stack of End device .

In TX340s the IPv6 stack responds to Auto Configuration when it is in static configuration after some time. Thus it starts sending packets with EUI-64 IPv6 address after some time.

Thanks everyone for the response. 

 

can you share last config 
thanks 

MHM

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