we have the ISR4431 as the internet router connected on the inside from an ASA 5525X
on the ASA a number of networks/devices are Natted to different public IP addresses
as below
Internet xx.xx.xx.11 7 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.12 36 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.13 186 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.14 236 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.15 92 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.16 52 00a0.c910.0201 ARPA Port-channel1.134
Internet xx.xx.xx.17 35 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.18 61 00a0.c910.0201 ARPA Port-channel1.134
Internet xx.xx.xx.20 151 00a0.c90f.0201 ARPA Port-channel1.134
Internet xx.xx.xx.21 37 00a0.c90f.0201 ARPA Port-channel1.134
Now when we upgraded the OS on the ASA from 953 to 963 we could no longer get Internet access
even though the IP addresses were still in the arp cache
going back to 9.5.3 everything was ok again.
to get over this when we upgraded to 963 we had to send the following command from the ASA
debug menu ipaddrutl 6 xx.xx.xx.17
would clearing the ARP have the same effect?
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