topic Re: redundantancy in Network Security

redundantancy

zeuscyril — Mon, 11 Mar 2019 15:46:57 GMT

hi friends,

i have one asa 5520 in data center,i got internet line from my isp .

they given two wires one is for main line and other one is redundant.they mention that two cables are connected in different switches of their side so if one switch goes off using other cable we can survive, but i need to connect two cables in same firewall . i have totally 13 ips so how i ll connect .

note : my idea is when one cable goes off using other cable it has to work.all ip's in same subnet

Re: redundantancy

Collin Clark — Tue, 23 Jun 2009 12:28:28 GMT

You can use the redundant interface feature-

http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/intrface.html#wp1062296

Re: redundantancy

zeuscyril — Tue, 23 Jun 2009 13:41:23 GMT

thank you for ur link.

but i have all ips in same subnet so i cannt use other ip in the same firerwall in other interfaces like 0/2,0/3

it will say error as same subnet

Re: redundantancy

Collin Clark — Tue, 23 Jun 2009 13:42:48 GMT

How about creating a "outside" vlan on the ASA and assigning two physical ports to that VLAN?

Re: redundantancy

mmacdonald70 — Mon, 29 Jun 2009 21:51:56 GMT

That is the purpose of the redundant interface. You assign the IP address to a (virtual) redundant interface and then assign interfaces to the virtual interface:

interface redundant0

member interface gi0/2

member interface gi0/3

ip address x.x.x.x x.x.x.x

...