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Questions tagged [ospf]

OSPF (Open Shortest Path First) is a link state routing protocol for interior routing within single autonomous system (AS).

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How do I advertise routes from a non-OSPF network into OSPF networks

I have the following configuration I have routers R6, R8, R9, R10 and R11 running OSPF. And routers R12, R13 and host C1 aren't. C1 has its default gateway set to R13's shared interface and R13 and R12 have their default gateways set to R6's…
Heathcliff
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EIGRP vs OSPF for internal routing

What's the difference bewteen EIGRP and OSPF for internal routing ? I know that EIGRP can only be deployed on CISCO equipement, but what's the point of using it instead of OSPF on a heterogenous architecture ? It's none, what's the point of using it…
Antoine Orsoni
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RIP versus OSPF

If in my network there is a RIP, EIGRP, OSPF then a request is sent and It may pass to any of the 3 protocols, which among the three has the highest priority or the protocol that is being executed?
beginner
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view the maximum equal cost paths configured for OSPF

How do you check if the maximum number of equal cost paths has been modified (with the (config-router)# maximum-paths command)? Is the only way by viewing the running configuration? show ip ospf doesn't seem to tell me anything about this.
red888
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OSPF and routing by subnet prefix

Sorry for newbie question for OSPF. I am in the process of learning the protocol, and there is some very basic thing I do not understand. In OSPF the routing is based on router id - which usually is one of its IP addresses. However what actually…
Boris
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Filter OSPF routes redistributed by BGP

I am redistributing OSPF routes inside a network, through BGP. However I don't want to redistribute all the advertised routes from OSPF (specificaly the private networks) to the outside of the AS. How can I prevent some routes from being…
João Rodrigues
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Need advice on Juniper OSPF networking

I have been thrown in to this project because of a coworker's termination. I have a set of Juniper SRX 550 Routers. I need to create an OSPF network that passes all traffic (All subnets) as if it were a straight patch cable between switches. The…
Russell G.
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BGP into OSPF and vice-versa - adding a 'weight' to a route?

This is probably more of a design question. I have two transit providers where I am receiving the full Internet routing table (via BGP) and am also participating in an IX where I am receiving routes from peers within that IX (also via BGP). I then…
cpjones44
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DMVPN and OSPF (two tunnels dynamic routing)

please help me to resolve the problem with routing between dmvpn GRE tunnels. I've got a DMVPN HUB and SPOKE topology. HUB has public ip address in internet. SPOKE has two ISPs for redundancy. I've decided to create two GRE tunnels between HUB and…
HFFreeway
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Reachability with OSPF on firewalled network

I'm trying to figure out how OSPF establishes routes when used on a network with firewalls. Say I have four routers (A, B, C, and D) and two firewalls (F1 and F2), arranged like so: (LocalA) A - F1 - B - C - F2 - D (LocalD) Say F1 blocks all…
exxodus7
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OSPF LSA Group Pacing

Is LSA group pacing enabled by default in Cisco IOS or something that needs to be configured under the OSPF process? How do you determine if it is currently enabled or not?
THE DOCTOR
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Static into OSPF Redistribution

I am trying to create static routes which are redistributed as E1 Type 5 External OSPF LSAs. If I check the routing tables on my other connected routers, these redistributed routes show up properly. However, the routes appear as static routes on the…
THE DOCTOR
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Importance of loopback ip address

Why do we configure loopback IP address in router RIP and router OSPF configuration ? What is the significance of configuring it ?
pankmish
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Juniper OSPF subnet mismatch from Quagga router

I am trying to setup a OSPF area between a Juniper MX80 and a Quagga router. The Quagga router has OSPF configured and network 199.192.100.0/28 advertised in the hello packet. But the Juniper MX80 is rejecting it with the following error: Jan 22…
Andy Shinn
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replacing 3 Cisco Catalyst 4500

Our network supplier recommends replacing our 3 cisco catalyst 4500's because they are EOL and dont speak OSPF (which we really want) Its not my area of expertise so I cant say for sure if we really need to replace these units but for my company the…
hoberion
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