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тАО04-29-2004 02:50 AM
тАО04-29-2004 02:50 AM
UCX Show route
Maybe this will explain what I've done on our Cisco router.
config t
interface ethernet 0
no ip address 207.107.145.195 255.255.255.224 secondary
no ip address 216.208.33.193 255.255.255.224
ip address 10.0.0.4 255.255.255.0
exit
exit
copy running-config startup-config
Remove the old BGS Internet Feed Sub-Interface:
config t
no interface serial 0.10
exit
copy running-config startup-config
Modify the Routing Protocol so remote sites Learn of the changes:
config t
router eigrp 1
no network 207.107.145.0
network 10.0.0.0
exit
copy running-config startup-config
Change the Router's Default Gateway to the new Internet Feed:
config t
no ip route 0.0.0.0 0.0.0.0 serial 0.10
ip route 0.0.0.0 0.0.0.0 10.0.0.1
exit
copy running-config startup-config
Here's what I've done on our Alpha UCX settings.
UCX>set route/gate=10.0.0.4/def/perm
UCX> set route 220.0.6.0 /gateway=10.0.0.4
UCX> show route
AN 220.0.6.0 10.0.0.4
UCX> show route /perm
PERMANENT database
Type Destination Gateway
PN 0.0.0.0 10.0.0.4
PN 220.0.6.0 10.0.0.4
Now whenever a remote site looses power, the Alpha UCX route sets the gateway to 10.0.0.1. I have to manually go into UCX and change the gateway to point to 10.0.0.4.
We're running OpenVMS 6.2-1H3, UCX V 4.1.
We have users using the Frame and others using Telent using their ISP to connect to our Alpha box.
Does anyone know why this is happening and how I can fix so I don't have to keep going in and make changes whenever there is a power outage?
TIA,
Mike
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тАО04-29-2004 03:12 AM
тАО04-29-2004 03:12 AM
Re: UCX Show route
Now whenever a remote site looses power
That means, ths CISCO can no longer access 'the other side'. result, like you stated:
Change the Router's Default Gateway to the new Internet Feed:
config t
no ip route 0.0.0.0 0.0.0.0 serial 0.10
ip route 0.0.0.0 0.0.0.0 10.0.0.1
exit
copy running-config startup-config
That will mean that the default route for the router is 10.0.0.1, and if the 'otehr side' is lost, all traffic will go that way.
UCX will take that address as well - as advertised by the router. At least, that is what I conclude, perhaps UCX optimizes: Default 10.0.0.4 = routed on that CISCO to 10.0.0.1 (since it lost the other side and will then use it's default). Quite likely it's the same network - so why bother that router - send it over to the other one directly.
It might be an idea (i'm not that familiar with it) that another routing advertisement protocol could prevent this.
HTH (FWIIW)
Willem
OpenVMS Developer & System Manager
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тАО04-29-2004 06:36 AM
тАО04-29-2004 06:36 AM
Re: UCX Show route
I've seen exactly the same behaviour with
recent versions of TCP/IP (aka UCX) too.
Since these routers are not under our control
in this specific case we ended up writing a little script to reset the routes if needed...
Greetings, Martin
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тАО04-29-2004 08:50 PM
тАО04-29-2004 08:50 PM
Re: UCX Show route
Is this a bad thing? It may be deliberate to prevent problems when a route fails and recovers briefly and fails again.
Purely Personal Opinion
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тАО04-30-2004 02:38 AM
тАО04-30-2004 02:38 AM
Re: UCX Show route
at least for us the problem was that the router was lying ;-), i.e. it advertised the route obviously but we could not get to the target actually since we were blocked by a firewall after the router.
And yes, this is more of an organisatorial than a technical problem, but hey aren't many problems in IT of that kind?
Greetings, Martin