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Author Topic: challenging wide network OSPF + HP comware + OOB management :)  (Read 2165 times)

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Offline romnet

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challenging wide network OSPF + HP comware + OOB management :)
« on: September 10, 2018, 02:18:45 PM »
Hey guys, I'm looking for your opinion on the following :

Big routed network for a country-wide tetra network. We have routers (actually L3 switches from HP) that are in several locations, all connected by various long-haul (licensed) wireless links.

My concern is : the client previously broadcasted a management vlan with all its OOB management interfaces, let's say vlan number 100. There was also a OSPF instance running on all switches connected to between 1 and 4 other switches (mesh network). On top of that STP running as well :)

I'm trying to figure out good practices I could propose them :

1st approach : change all links between switches to "route" mode and not bridge (cisco equivalent : no switchport), and then make all vlans actually routed. In this scenario, I guess I need to have on small, let's say /30 network for local management that will be routed, each location having it's all /30 management network.

2nd approach : keep the same mix as they did, with OSPF + vlans running together, good thing is the management vlan is the same everywhere and is not affected by OSPF malfunctions :D

That's a tricky question I think, 1st approach looks better to me, but I have never deployed such wide network with routing + OOB management  :) any clues ?

Offline Michael McNamara

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Re: challenging wide network OSPF + HP comware + OOB management :)
« Reply #1 on: September 10, 2018, 08:29:12 PM »
I would suggest a loopback interface running OSPF in passive mode... you could assign a /32 address to the loopback, let OSPF figure out the routing, then you have a single IP address to manage the switch/router regardless of what /30 network is up or running to get to said device.

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Offline TankII

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Re: challenging wide network OSPF + HP comware + OOB management :)
« Reply #2 on: October 16, 2018, 05:17:40 PM »
Also, cost all nodes in the multi-homed port differently.  Say add a cost of one to one of two different links that have the same speed.    Say two links are 20Mbit.  Cost one at 50 and cost the other at 51. 
If they are all point-to-point, then you have to be a bit more creative to keep the routing clean.  I'm assuming you are not running Multicast across these paths?