EtherChannel between cisco devices need help

Question

Hello,
At our company we use 2 asa 5525 firewalls in active/standby mode.
Both of them are connected to a single cisco router.
The goal is to have the cisco router to automatically send traffic to the active firewall (regardless which firewall is active at that point).
To solve this would it be possible to create an EtherChannel with 2 ports on the cisco router and then have 1 link going to the active firewall and 1 link to the standby firewall.
If the active firewall fails and the standby firewall takes over, will the standby firewall receive all the traffic that normally would go to the active firewall without any downtime?
Will this work or does another solution exists for this? Its important for us that the hosts on the network suffer small to none downtime at all.
The topology can be found in the following image.

Answer 1

Hello
"You could possibly use bridging on the router which would allow you to  have two interfaces on the same router in the same IP subnet and connect  one interface to the active firewall and one to the standby. But i  cannot say for sure this would work as i have never done it with ASAs"
Please see below:
ASA1
====
.interface GigabitEthernet0
nameif inside1
security-level 100
ip address 192.168.1.10 255.255.255.0
ASA2
====
.interface GigabitEthernet0
nameif inside2
security-level 100
ip address 192.168.1.11 255.255.255.0
router
=====
bridge irb
bridge 100 protocol ieee
bridge 100 route ip
interface FastEthernet0/0
Description Link to ASA1
bridge-group 100
interface FastEthernet0/1
Description Link to ASA2
bridge-group 100
interface BVI100
ip address 192.168.1.254 255.255.255.0
R1#ping 192.168.1.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.10, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/34/72 ms
R1#ping 192.168.1.11
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.11, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/38/88 ms
asa1#  ping 192.168.1.11
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.11, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
asa1#ping 192.168.1.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.254, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 10/34/50 ms
NOTE:
You can also NOT apply an ip address to the BVI interface and you would still be able to ping between the FW'S
res
Paul