All different mix of ROS Versions. There must be something special
about the default route.
On 7/19/2018 5:20 PM, Bill Prince wrote:
What version(s) of ROS are you using? We have a couple of the routers
that are back-rev, and we're wondering if this is a version issue.
It's kind of ironic that the only route that does not propagate is the
default route. That seems counter to what you would expect.
--
bp
part15sbs{at}gmail{dot}com
On Thu, Jul 19, 2018 at 3:07 PM Nate Burke <[email protected]
<mailto:[email protected]>> wrote:
Exactly, only the default route is affected. I see the same
thing. All other routes are fine except for the default route.
On 7/19/2018 5:02 PM, Bill Prince wrote:
It's a mix of Mikrotik routers. Many MIPSBE, CCR, and X86
architectures.
It seems to be specific to the OSPF routing table and the default
route. If it's not a default route, but a loopback interface, or
other ordinary interface, the route will propagate from one end
to the other almost immediately. But if it's the default route,
it will drop from ip/routes, but hang out as a zombie in OSPF.
--
bp
part15sbs{at}gmail{dot}com
On Thu, Jul 19, 2018 at 2:02 PM Nate Burke <[email protected]
<mailto:[email protected]>> wrote:
What types of routers? I've seen this happen on Mikrotik.
Any OSPF change anywhere in the network will fix it. I have
dedicated routers hanging at points on the network running a
script that pings an Internet Address, and downs it's OSPF
network if it's unreachable. To address this specific senario.
On 7/19/2018 2:02 PM, Sterling Jacobson wrote:
Maybe not quite a similar problem, but I had forgotten to
advertise BGP one time on one of the routers when I thought
things would magically fail over.
*From:* AF <[email protected]>
<mailto:[email protected]> *On Behalf Of * Bill Prince
*Sent:* Thursday, July 19, 2018 11:44 AM
*To:* AFMUG <[email protected]> <mailto:[email protected]>
*Subject:* [AFMUG] OSPF not propagating default route...
Our backbone is 9 hops from one end to the other. We have 2
ASes and 2 exits at either end. "Most" of the time the
traffic is 50/50 right at the midpoint (4 hops one way, and
4 hops the other). However, when we kill BGP at one end or
the other, the default routes do not switch over. The two
BGP routers are set to "distribute-default" "always as type
1". Clearly, this is not working the way we expect it to.
Any clues about what we are missing here?
--
bp
part15sbs{at}gmail{dot}com
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