How to ping PC from network behind d-link DSR-500 device to PC behind d-link dfl-210 device via ipsec?

Question

VPN

PC1 (192.168.12.161) behind d-link firewall DSR 500 (192.168.12.231)
PC2 (192.168.100.121) behind d-link firewall DFL 210 (192.168.100.1)
Between ipsec is configured, PC2 pings both PC1 and DSR 500, with PC1 pings DFL 210 and does not ping PC2
Ip rules configured ping_all Allow any all-nets any all-nets all_icmp In DFL
210 logs I get an error 100.121 ttl_low drop _
rev=1 ttl=2 ttlmin=3 ipdatalen=72 icmptype=ECHO_REQUEST echoid=1 echoseq=2268
2022-10-07
21:00:57
Warning IP_PROTO 07000014 TTLOnLow
ICMP test
192.168.12.161
192.168.100.12
dropl tt = 192.168.100.12 =2 ttlmin=3 ipdatalen=72 icmptype=ECHO_REQUEST echoid=1 echoseq=2267 2022-10-07 21:00:53 Warning IP_PROTO 07000014 TTLOnLow ICMP test 192.168.12.161 192.168.100.121 ttl_low drop rev2 ltt=3 ipdatalen=72 icmptype=ECHO_REQUEST echoid=1 echoseq=2266 2022-10-07 21:00:49 Warning IP_PROTO
07000014 ICMP test TTLOnLow
192.168.12.161
192.168.100.121
ttl_low
drop
rev = 1 ttl = 1 ttlmin = 3 ipdatalen = 72 icmptype = ECHO_REQUEST echoid = 1 echoseq = 2265
2022-10-07
21:00:45 Warning IP_PROTO
07000014 ICMP test
TTLOnLow 192,168 .12.161
192.168.100.121
ttl_low
drop
rev = 1 ttl = 1 ttlmin = 3 ipdatalen = 72 icmptype = ECHO_REQUEST echoid = 1 echoseq = 2264
2022-10-07
21:00:41 Warning IP_PROTO
07000014 ICMP test TTLOnLow
192.168.12.161
192.168.100.121
ttl_low
drop
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If all icmp are allowed what am I doing wrong?