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ASR 1002 Inter-Chassis Redundancy and PAT

eddschulz
Level 1
Level 1

Hello

we are using ASR 1002 with inter-chassis redundanz.

In general the replication of nat sessions is working, now we want to change the whole thing to pat.

Now we are observe an issue if the device is configured to use pat

NAT1#show ip nat transla

Pro Inside global Inside local Outside local Outside global

tcp a.x.144.0:1024 192.168.252.2:51629 100.100.100.100:22 100.100.100.100:22

tcp a.x.144.0:1025 192.168.252.2:37761 100.100.100.100:22 100.100.100.100:22

tcp a.x.144.0:1026 192.168.252.2:37309 100.100.100.100:80 100.100.100.100:80

tcp a.x.144.0:1027 192.168.252.2:51628 100.100.100.100:22 100.100.100.100:22

Total number of translations: 4

NAT2#show ip nat transla

Pro Inside global Inside local Outside local Outside global

tcp a.x.144.0:1024 192.168.252.2:51629 100.100.100.100:22 100.100.100.100:22

tcp a.x.144.0:1025 192.168.252.2:37761 100.100.100.100:22 100.100.100.100:22

tcp a.x.144.0:1027 192.168.252.2:51628 100.100.100.100:22 100.100.100.100:22

Total number of translations: 3

The ssh session is replicated between the two asr devices but the www is not.

My Question now, is it a feature or a bug? Inside the documentation i did not find a hint for that issue.

Whole config:

ip nat pool officialips_pat a.x.144.0 a.x.144.3 netmask 255.255.255.252

ip nat inside source list natedhost_pat pool officialips_pat redundancy 1 mapping-id 100 overload

ip access-list extended natedhost_pat

remark allow_all_pat_applications-networks

permit ip 192.168.0.0 0.0.255.255 any

remark deny_anything_else

deny ip any any log

redundancy

mode none

application redundancy

group 1

name GROUP_1

preempt

priority 100 failover threshold 60

timers delay 60 reload 300

control Port-channel20 protocol 1

data Port-channel10

track 10 decrement 200

track 20 decrement 200

protocol 1

authentication md5 key-string xxx

interface Port-channel1.1099

encapsulation dot1Q 1099

ip address 10.64.21.99 255.255.255.240

no ip redirects

no ip proxy-arp

ip nat inside

ip virtual-reassembly

redundancy rii 1099

redundancy group 1 ip 10.64.21.97 exclusive decrement 200

!

interface Port-channel1.1100

encapsulation dot1Q 1100

ip address 10.64.21.115 255.255.255.240

no ip redirects

no ip proxy-arp

ip nat outside

ip virtual-reassembly

redundancy rii 1100

redundancy group 1 ip 10.64.21.113 exclusive decrement 200

!

3 Replies 3

eddschulz
Level 1
Level 1

asr 1002

ios: adventerprisek9.03.02.01.s151-1.s1

I asked to a guy from Cisco

Port 80 is not synchronized between the devices

Mukesh Kumar
Level 3
Level 3

Hello eddschulz

I am having 2 ASR 1002 routers. Now i want interchassis hardware redundancy between them.

1) Can you please tell me what are the prerequisites for configuring interchassis hardware redundancy?

 2) As you have already this setup of two ASR connected with each other having interchassis hardware redundancy. Is it working fine? Have you faced any problem in interchassis hardware redundancy?

3) Which licence is required for interchassis hardware redundancy?

 

Regards,
Mukesh Kumar
Network Engineer
Spooster IT Services

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