- Is it possible to migrate without disruption? because I need to
re-configure network statements for area 0 (currently all interfaces are
in different areas)
Is this possible by running a second OSPF process e.g. ? and then remove the old network statements
Is hard to do it without complete disruption because when change areas, the OSPF will need to reconfigure. Maybe with a combination of temporary static routing during the OSPF modification you could avoid network interuptions, but OSPF will be affected. Keep in mind that you can have multiple OSPF processes, but only one routing table (if we are not talking about VRF lite, and here I don't think it's the case). It would be helpful if I know how are the 4 devices connected and where the backbone area 0 reside.
- Also for simplicity, I want to deploy the command, because only the vlan interface that is used
between the 4 core switches should not be passive. The GUI doesn't
accept it when I configure first the
where x= vlan between core switches.
I don't know about GUI, but from CLI this should be like:
enable
configure terminal
router ospf x -> x represent the ospf process
passive-interface default
no passive-interface vlanXY -> xy represent the vlan number
What are the pros and cons if I enable OSPF on the FWSM blades, (pro
would be removing a lot of static routes on the core switches
Pros: reduce overhead administration with static routing, dynamic redundancy possible
Cons: more memory utilization and traffic increase (due to ospf packets being exchanged / not a big problem usually), in a large network unwanted networks may arrive on the FWSM through OSPF dynamic routing (if not explicit denied)
May be more here, but right now I cannot think of any other.
Good luck and let me know if you need more help.
Cheers,
Calin
