topic FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency in Network Security

FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

sam cook — Fri, 21 Feb 2020 15:32:58 GMT

Hi team,

I'm simulating packet tracer before putting my FTD on production:

But when sending a packet from a Lan machine to google :

I get always this result :

Result:

input-interface: inside

input-status: up

input-line-status: up

output-interface: outside

output-status: up

output-line-status: up

Action: drop

Drop-reason: (no-adjacency) No valid adjacency

Does any one knows if this message (Drop-reason: (no-adjacency) No valid adjacency) means a NAT problem or routing problem ?

Regards,

Re: FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

Marvin Rhoads — Thu, 22 Mar 2018 10:18:35 GMT

Generally that would be a routing issue. Although since your target is a FQDN it could also be DNS lookup. Substitute a target public IP to rule that out.

Have you configured a default route on the device?

Re: FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

sam cook — Thu, 22 Mar 2018 10:33:39 GMT

Thank you Marvin ,

In fact I found the issue :

seen that I'm testing this outside the production , the FTD did not find the mac adress of next hop.

So i think when i will put it in production , it will resolve the mac adress and packet will be allowed.

regards,

Re: FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

hossam helal — Thu, 02 Apr 2020 04:16:36 GMT

◄ I have same issue ►

packet-tracer input inside icmp 70.1.2.2 8 0 172.16.111.100

Phase: 13
Type: ROUTE-LOOKUP
Subtype: Resolve Egress Interface
Result: ALLOW
Config:
Additional Information:
found next-hop 172.16.111.100 using egress ifc outside

Result:
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: drop
Drop-reason: (no-adjacency) No valid adjacency

==========[ fix ] ==========

no xlate per-session deny tcp any4 any4
no xlate per-session deny tcp any4 any6
no xlate per-session deny tcp any6 any4
no xlate per-session deny tcp any6 any6
no xlate per-session deny udp any4 any4 eq domain
no xlate per-session deny udp any4 any6 eq domain
no xlate per-session deny udp any6 any4 eq domain
no xlate per-session deny udp any6 any6 eq domain

========[ verification ] ========

Phase: 13
Type: ROUTE-LOOKUP
Subtype: Resolve Egress Interface
Result: ALLOW
Config:
Additional Information:
found next-hop 192.168.201.111 using egress ifc outside

Phase: 14
Type: ADJACENCY-LOOKUP
Subtype: next-hop and adjacency
Result: ALLOW
Config:
Additional Information:
adjacency Active
next-hop mac address 5254.0094.9ec5 hits 31930 reference 3

Result:
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: allow

Kind Regards,

Hossam

Re: FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

Cristian Matei — Thu, 02 Apr 2020 04:34:27 GMT

Hi,

This is either a bug, either there is no valid adjacency (IP-to-MAC binding) for the next-hop.

Regards,

Cristian Matei.

Re: FTD failed simulation : Drop-reason: (no-adjacency) No valid adjacency

hossam helal — Mon, 06 Apr 2020 04:59:56 GMT

Hi,

I use that version

ASA# show version

Cisco Adaptive Security Appliance Software Version 9.9(1)
Firepower Extensible Operating System Version 2.3(1.54)
Device Manager Version 7.9(1)

Compiled on Thu 30-Nov-17 20:21 PST by builders
System image file is "boot:/asa991-smp-k8.bin"
Config file at boot was "startup-config"

ASA up 2 hours 24 mins

Hardware: ASAv, 4096 MB RAM, CPU Pentium II 1699 MHz, 1 CPU (2 cores)
Model Id: ASAv30
Internal ATA Compact Flash, 129024MB
Slot 1: ATA Compact Flash, 129024MB
BIOS Flash Firmware Hub @ 0x0, 0KB

0: Ext: Management0/0 : address is 5254.003c.3c2c, irq 11
1: Ext: GigabitEthernet0/0 : address is 5254.a4a4.0f4e, irq 11
2: Ext: GigabitEthernet0/1 : address is 5254.b1b1.0ee7, irq 10

License mode: Smart Licensing
ASAv Platform License State: Unlicensed

◄================================== ►

◄================[config: -]================== ►

access-list OUTSIDE_INBOUND extended permit icmp any any

icmp unreachable rate-limit 1 burst-size 1
icmp permit any echo outside
icmp permit any echo-reply outside
icmp permit any outside
icmp permit any echo inside
icmp permit any echo-reply inside
icmp permit any inside

access-group OUTSIDE_INBOUND in interface outside
access-group OUTSIDE_INBOUND out interface outside
access-group OUTSIDE_INBOUND in interface inside
access-group OUTSIDE_INBOUND out interface inside

policy-map global_policy
class inspection_default
inspect icmp
inspect icmp error

may be we should open bug with cisco

Regards,

Hossam