07-28-2010 02:00 PM - edited 03-11-2019 11:17 AM
Dear All
I have two ASA 5520 with 4 Giga interfaces and 1 management interface.
I need to use 4 interfaces four data traffic
1- Inside
2- Outside
3- dmz-1
4- dmz-2
The remaining will be the management interface only.How can I configure the Statefull failover and Management?
What I did?
1- I used the management0/0 for The stateful failover.
2- I used gig 0 for outside
3- I used gig 1 for inside
4- I used gig 2 for dmz-1
5- I divided the gig 3 to two sub interfaces
a- gig0/3.1 for dmz-2
b- gig0/3.2 for Management and I defined it as a management-only
Does anyone has comments or recommendatiosn on this design? Please advise.
Thanks on advance,
07-28-2010 02:07 PM
The way that you propose is fine, but what is the reason for needing a management-only interface? If it is more convenient you can manage from any interface that you are behind.
08-01-2010 12:14 AM
Dear August
Thanks for your reply.
I just put it to follow the security standard of having a didicated management interface for the ASA.
Do you have any concern about configuring the management 0/0 with stateful and lan faiover?
Thanks,
08-01-2010 05:24 PM
Ahmad, it is recomended to have a stateful failover interface that is as fast as the fastest traffic passing interface. With your design that would have to be one if the Gig ports. This is to ensure that failover stateful info is not going to overload the failover link. I do not have the document infront of me, but im sure it is documented somewhere. - Magnus
08-01-2010 10:07 PM
as magnus suggested, it is not recommended to use management interface for state
ful failover
here is the link which has cisco recommendations
08-01-2010 10:16 PM
Jitendriya,
Thanks for the link. Ahmad, the key lines in that document are as follows:
"Cisco recommends that you do not use the management interface for failover, especially for stateful failover in which the security appliance constantly sends the connection information from one security appliance to the other. The interface for failover must be at least of the same capacity as the interfaces that pass regular traffic, and while the interfaces on the ASA 5540 are gigabit, the management interface is FastEthernet only. The management interface is designed for management traffic only and is specified as management0/0."
- Magnus
11-02-2011 11:15 AM
I'm in the same situation with a pair of 5520s. For clarification I found the following excerpt from Cisco Docs stating different requirements for various ASA models. Link at the bottom.
If you use the failover link as the Stateful Failover link, you should use the fastest Ethernet interface available. If you experience performance problems on that interface, consider dedicating a separate interface for the Stateful Failover interface.
Use the following failover interface speed guidelines for the adaptive security appliances:
•Cisco ASA 5510
–Stateful link speed can be 100 Mbps, even though the data interface can operate at 1 Gigabit due to the CPU speed limitation.
•Cisco ASA 5520/5540/5550
–Stateful link speed should match the fastest data link.
•Cisco ASA 5580/5585
–Use only non-management 1 Gigabit ports for the stateful link because management ports have lower performance and cannot meet the performance requirement for stateful failover.
http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/ha_overview.html#wp1078922
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