Dynamic Routing Protocols - what do I really need to know?
Ok, ridiculously broad question I know but....what I'm trying to figure out is, let's say I'm in a large coproration and I have multiple field sites in different areas of the country so the network setup may be somewhat complex but when it comes to setting up the dynamic routing...is it as simple as let's say, configuring a router to use BGP for whatever portion you designate then just letting it be? is it somewhat challenging to initally configure dynamic routing protocols (i.e. how often have you found yourselves worrying about admin distance, areas (I don't even know what an "area" is yet either so if anyone could explain that I would appreciate it), etc..
So in short, are dynamic routing protocols "Set it and forget it" or do they require a ton of planning to setup? I'm familliar with the differences between them (i.e. OSPF, RIP, EIGRP,etc..) and the differences in link state and distance vector but I just wanted to ask about the setup of the protocols themselves.
Thanks!!
You can exchange routes between protocols with redistribution.
The problem with the question is, as you say, it is too broad to really answer properly.
All routing protocols have different considerations so what you might do for EIGRP you may not do with OSPF and BGP is different altogether.
As a general answer if you are enabling it across a WAN all take a certain amout of planning and design and they all rely heavily on what you have done with your IP addressing in terms of summarisation etc.
The actual configurations to get a basic setup running are relatively simple, certainly for IGPs, but as your network grows you may find the configurations becoming more complex
BGP is a very different in that there are many different commands you can use to influence the path traffic takes but even here to setup a very basic BGP peering only requires a few commands.
But no routing protocol in a large environment should just be configured with no thought as to how it is going to work, traffic paths, number of routes etc.
You can do it but you may well find as your network grows you will end up having to revisit the whole thing because it is not working as you intended.
Like I say it's too large a question to really answer because each routing protocol is different and may or may not meet the requirements of the network.
If there are more specific questions then please feel free to ask.
Jon
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Wold like to know whether dynamic Routing Protocol Support in Cisco ASA Firewall Multiple Context Mode. If yes then please provide OS version and Hardware Model of Cisco ASA Firewall. Appreciate the quick response. Thanks.Hi,
Check out this document for the information
http://www.cisco.com/en/US/docs/security/asa/roadmap/asa_new_features.html#wp93116
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Hi, guys
I know RRAS can support only RIP protocol. However, I cant find any way to configure dynamic routing protocol on TMG, some people say TMG cant support that even rip. That’s right? Is it possible or is there any plug-in can help TMG to do that?
Nice DayHi,
Thank you for your post here.
As far as I know, it is impossible to do that. By default, TMG does not support it.
http://technet.microsoft.com/en-us/library/ee796231.aspx#t4t4e4t
Best Regards
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Good CCIE question: Can multiple site-2-site VPNs support dynamic routing protocols?
Hi All,
Was not sure if this should be posted in LAN routing, WAN routing or VPN forums: I have posted here as the VPN tunnels are the limiting factors...
I am trying to understand if it is possible to have dynamic routing between LANs when using site to site VPNs on three or more ASA55x5-x (9.0).
To best explain the question I have put together an example scenario:
Lets say we have three sites, which are all connected via a separate site-2-site IKEv2 VPNs, in a full mesh topology (6 x SAs).
Across the whole system there would be a 192.168.0.0/16 subnet which is divided up by VLSM across all sites.
The inside / outside interfaces of the ASA would be static IPs from a /30 subnet.
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New subnets are added and removed at each site on a frequent basis.
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(http://www.diagram.ly/?share=#OtprIYuOeKRb3HBV6Qy8CL8ZUE6Bkc2FPg2gKHnzVliaJBhuIG)
Now, using static route redistribution from the ASAs into EIGRP and making the ASAs to be an EIGRP neighbour, would be one way. This would mean an isolated EIGRP AS per site, but each site would only learn about a new remote subnet if the crypto map match ACL was altered. But the bit that I am confused over, is the potential to have new subnets added or removed which would require EIGRP routing processes on the relevant site X router to be altered as well as crypto map ACLs being altered at all sites. This doesn't seem a sensible approach...
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Is there a way to have dynamic crypto maps based on router information?
P.S. Diagram above produced via http://www.diagram.ly/Hi Guys,
Thanks for your responses! I am learning here, hence the post.
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ospf network point-to-point non-broadcastSpecifies the interface as a point-to-point, non-broadcast network.When you designate an interface as point-to-point and non-broadcast, you must manually define the OSPF neighbor; dynamic neighbor discovery is not possible. See the "Defining Static OSPFv2 Neighbors" section for more information. Additionally, you can only define one OSPF neighbor on that interface.
Otherwise I would agree it would be happy days...
Any other ideas (maybe around iBGPs like OSPF) which do not envolve GRE tunnels or terminating the IPSEC on the core router please?
Kindest Regards,
James. -
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Hi,
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regards
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