Airtel is rolling out IPv6 on their wired broadband services

Can you post logs from both openwrt and pfsense. Assuming you tried to use the same wan6 config on both.
 
Here is openwrt


Code:
Sat Jan  9 10:30:18 2021 daemon.notice netifd: Interface 'wan' is setting up now
Sat Jan  9 10:30:19 2021 daemon.err insmod: module is already loaded - slhc
Sat Jan  9 10:30:19 2021 daemon.err insmod: module is already loaded - ppp_generic
Sat Jan  9 10:30:19 2021 daemon.err insmod: module is already loaded - pppox
Sat Jan  9 10:30:19 2021 daemon.err insmod: module is already loaded - pppoe
Sat Jan  9 10:30:19 2021 daemon.info pppd[4267]: Plugin rp-pppoe.so loaded.
Sat Jan  9 10:30:19 2021 daemon.info pppd[4267]: RP-PPPoE plugin version 3.8p compiled against pppd 2.4.7
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: pppd 2.4.7 started by root, uid 0
Sat Jan  9 10:30:19 2021 daemon.info pppd[4267]: PPP session is 2250
Sat Jan  9 10:30:19 2021 daemon.warn pppd[4267]: Connected to xx:xx:xx:xx:xx:xx via interface eth0.2
Sat Jan  9 10:30:19 2021 kern.info kernel: [12796881.125618] pppoe-wan: renamed from ppp0
Sat Jan  9 10:30:19 2021 daemon.info pppd[4267]: Renamed interface ppp0 to pppoe-wan
Sat Jan  9 10:30:19 2021 daemon.info pppd[4267]: Using interface pppoe-wan
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: Connect: pppoe-wan <--> eth0.2
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: PAP authentication succeeded
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: peer from calling number xx:xx:xx:xx:xx:xx authorized
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: local  IP address 122.xx.xx.yy
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: remote IP address 171.76.72.1
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: primary   DNS address 125.22.47.125
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: secondary DNS address 203.145.160.4
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: local  LL address fe80::xxxx:xxxx:xxxx:xxxx
Sat Jan  9 10:30:19 2021 daemon.notice pppd[4267]: remote LL address fe80::xxxx:xxxx:xxxx:xxxx
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Network device 'pppoe-wan' link is up
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Interface 'wan' is now up
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: reading /tmp/resolv.conf.auto
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain test
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain onion
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain localhost
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain local
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain invalid
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain bind
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using local addresses only for domain lan
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using nameserver 125.22.47.125#53
Sat Jan  9 10:30:19 2021 daemon.info dnsmasq[1691]: using nameserver 203.145.160.4#53
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Network alias 'pppoe-wan' link is up
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Interface 'wan_6' is enabled
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Interface 'wan_6' has link connectivity
Sat Jan  9 10:30:19 2021 daemon.notice netifd: Interface 'wan_6' is setting up now
Sat Jan  9 10:30:20 2021 user.notice firewall: Reloading firewall due to ifup of wan (pppoe-wan)
Sat Jan  9 10:30:20 2021 user.notice firewall: Reloading firewall due to ifupdate of wan (pppoe-wan)

root@OpenWrt:~# ping6 google.com
PING google.com (2404:6800:4007:810::200e): 56 data bytes
64 bytes from 2404:6800:4007:810::200e: seq=0 ttl=118 time=11.630 ms
64 bytes from 2404:6800:4007:810::200e: seq=1 ttl=118 time=14.712 ms
64 bytes from 2404:6800:4007:810::200e: seq=2 ttl=118 time=12.573 ms
64 bytes from 2404:6800:4007:810::200e: seq=3 ttl=118 time=14.266 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 11.630/13.295/14.712 ms
 
Following is pfsense:

Code:
Jan 9 15:12:25     ppp         [opt15] a236:9fff:fe19:0009 -> 32b6:4fff:fe3e:4120
Jan 9 15:12:25     ppp         [opt15] IPV6CP: LayerUp
Jan 9 15:12:25     ppp         [opt15] IPV6CP: state change Ack-Sent --> Opened
Jan 9 15:12:25     ppp         [opt15] IPV6CP: rec'd Configure Ack #1 (Ack-Sent)
Jan 9 15:12:25     ppp         [opt15] IFACE: Rename interface ng1 to pppoe1
Jan 9 15:12:25     ppp         [opt15] IFACE: Up event
Jan 9 15:12:24     ppp         [opt15] xx.xx.xx.xx -> 171.76.72.1
Jan 9 15:12:24     ppp         [opt15] IPCP: LayerUp
Jan 9 15:12:24     ppp         [opt15] IPCP: state change Ack-Sent --> Opened
Jan 9 15:12:24     ppp         [opt15] SECDNS 203.145.160.4
Jan 9 15:12:24     ppp         [opt15] PRIDNS 125.22.47.125
Jan 9 15:12:24     ppp         [opt15] IPADDR xx.xx.xx.xx
Jan 9 15:12:24     ppp         [opt15] IPCP: rec'd Configure Ack #3 (Ack-Sent)
Jan 9 15:12:23     ppp         [opt15] SECDNS 203.145.160.4
Jan 9 15:12:23     ppp         [opt15] PRIDNS 125.22.47.125
Jan 9 15:12:23     ppp         [opt15] IPADDR xx.xx.xx.xx
Jan 9 15:12:23     ppp         [opt15] IPCP: SendConfigReq #3
Jan 9 15:12:23     ppp         [opt15] SECDNS 203.145.160.4
Jan 9 15:12:23     ppp         [opt15] PRIDNS 125.22.47.125
Jan 9 15:12:23     ppp         [opt15] xx.xx.xx.xx is OK
Jan 9 15:12:23     ppp         [opt15] IPADDR xx.xx.xx.xx
Jan 9 15:12:23     ppp         [opt15] IPCP: rec'd Configure Nak #2 (Ack-Sent)
Jan 9 15:12:23     ppp         [opt15] IPV6CP: state change Req-Sent --> Ack-Sent
Jan 9 15:12:23     ppp         [opt15] IPV6CP: SendConfigAck #20
Jan 9 15:12:23     ppp         [opt15] IPV6CP: rec'd Configure Request #20 (Req-Sent)
Jan 9 15:12:23     ppp         [opt15] SECDNS 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] PRIDNS 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] IPADDR 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] IPCP: SendConfigReq #2
Jan 9 15:12:23     ppp         [opt15] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Jan 9 15:12:23     ppp         [opt15] IPCP: rec'd Configure Reject #1 (Ack-Sent)
Jan 9 15:12:23     ppp         [opt15] IPCP: state change Req-Sent --> Ack-Sent
Jan 9 15:12:23     ppp         [opt15] IPADDR 171.76.72.1
Jan 9 15:12:23     ppp         [opt15] IPCP: SendConfigAck #146
Jan 9 15:12:23     ppp         [opt15] 171.76.72.1 is OK
Jan 9 15:12:23     ppp         [opt15] IPADDR 171.76.72.1
Jan 9 15:12:23     ppp         [opt15] IPCP: rec'd Configure Request #146 (Req-Sent)
Jan 9 15:12:23     ppp         [opt15] IPV6CP: SendConfigReq #1
Jan 9 15:12:23     ppp         [opt15] IPV6CP: state change Starting --> Req-Sent
Jan 9 15:12:23     ppp         [opt15] IPV6CP: Up event
Jan 9 15:12:23     ppp         [opt15] SECDNS 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] PRIDNS 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Jan 9 15:12:23     ppp         [opt15] IPADDR 0.0.0.0
Jan 9 15:12:23     ppp         [opt15] IPCP: SendConfigReq #1
Jan 9 15:12:23     ppp         [opt15] IPCP: state change Starting --> Req-Sent
Jan 9 15:12:23     ppp         [opt15] IPCP: Up event
Jan 9 15:12:23     ppp         [opt15] IPV6CP: LayerStart
Jan 9 15:12:23     ppp         [opt15] IPV6CP: state change Initial --> Starting
Jan 9 15:12:23     ppp         [opt15] IPV6CP: Open event
Jan 9 15:12:23     ppp         [opt15] IPCP: LayerStart
Jan 9 15:12:23     ppp         [opt15] IPCP: state change Initial --> Starting
Jan 9 15:12:23     ppp         [opt15] IPCP: Open event
Jan 9 15:12:23     ppp         [opt15] Bundle: Status update: up 1 link, total bandwidth 64000 bps
Jan 9 15:12:23     ppp         [opt15_link0] Link: Join bundle "opt15"
Jan 9 15:12:23     ppp         [opt15_link0] Link: Matched action 'bundle "opt15" ""'
Jan 9 15:12:23     ppp         [opt15_link0] LCP: authorization successful
Jan 9 15:12:23     ppp         [opt15_link0] PAP: rec'd ACK #1 len: 5
Jan 9 15:12:23     ppp         [opt15_link0] LCP: LayerUp
Jan 9 15:12:23     ppp         [opt15_link0] PAP: sending REQUEST #1 len: 50
Jan 9 15:12:23     ppp         [opt15_link0] PAP: using authname "080**_kk@airtelbroadband.in"
Jan 9 15:12:23     ppp         [opt15_link0] LCP: auth: peer wants PAP, I want nothing
Jan 9 15:12:23     ppp         [opt15_link0] LCP: state change Ack-Sent --> Opened
Jan 9 15:12:23     ppp         [opt15_link0] MAGICNUM 0x7fb48d90
Jan 9 15:12:23     ppp         [opt15_link0] MRU 1492
Jan 9 15:12:23     ppp         [opt15_link0] PROTOCOMP
Jan 9 15:12:23     ppp         [opt15_link0] LCP: rec'd Configure Ack #1 (Ack-Sent)
Jan 9 15:12:23     ppp         [opt15_link0] LCP: state change Req-Sent --> Ack-Sent
Jan 9 15:12:23     ppp         [opt15_link0] MAGICNUM 0x414211ed
Jan 9 15:12:23     ppp         [opt15_link0] AUTHPROTO PAP
Jan 9 15:12:23     ppp         [opt15_link0] MRU 1492
Jan 9 15:12:23     ppp         [opt15_link0] LCP: SendConfigAck #195
Jan 9 15:12:23     ppp         [opt15_link0] MAGICNUM 0x414211ed
Jan 9 15:12:23     ppp         [opt15_link0] AUTHPROTO PAP
Jan 9 15:12:23     ppp         [opt15_link0] MRU 1492
Jan 9 15:12:23     ppp         [opt15_link0] LCP: rec'd Configure Request #195 (Req-Sent)
Jan 9 15:12:23     ppp         [opt15_link0] MAGICNUM 0x7fb48d90
Jan 9 15:12:23     ppp         [opt15_link0] MRU 1492
Jan 9 15:12:23     ppp         [opt15_link0] PROTOCOMP
Jan 9 15:12:23     ppp         [opt15_link0] LCP: SendConfigReq #1
Jan 9 15:12:23     ppp         [opt15_link0] LCP: state change Starting --> Req-Sent
Jan 9 15:12:23     ppp         [opt15_link0] LCP: Up event
Jan 9 15:12:23     ppp         [opt15_link0] Link: UP event
Jan 9 15:12:23     ppp         [opt15_link0] PPPoE: connection successful
Jan 9 15:12:23     ppp         PPPoE: rec'd ACNAME "brasblr8"
Jan 9 15:12:23     ppp         [opt15_link0] PPPoE: Connecting to ''
Jan 9 15:12:23     ppp         [opt15_link0] LCP: LayerStart
Jan 9 15:12:23     ppp         [opt15_link0] LCP: state change Initial --> Starting
Jan 9 15:12:23     ppp         [opt15_link0] LCP: Open event
Jan 9 15:12:23     ppp         [opt15_link0] Link: OPEN event
Jan 9 15:12:23     ppp         [opt15] Bundle: Interface ng1 created
 
@rajil.s


Screenshot-2021-01-11-084634.png


Is Allow IPv6 checked under System>Advanced>Networking?
 
It shows a Link-Local ipv6 address on WAN. At the moment, I am administering the router remotely so dont want to tinker much incase it gets messed up. Once I have physical access I will try to dig deeper into this.
 
This is my setting in TP-Link C1200. I am not getting IPv6. I also tried sharing the same PPPoe session of IPv4 with IPv6. Location- Patna

ipv6.png
 

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