hey guys some ospf for you, if you need any shows let me kno

aueddonlineaueddonline Member Posts: 611 ■■□□□□□□□□
in CCNP
I set up a ospf network with 3 routers all connected to a switch, also with r-alfa and r-beta connected with a serial cable, here's the config and the errors at the bottom are from r-beta

r-alfa configuration

config t
int s0/0
ip address 10.0.66.1 255.255.255.0
bandwidth 128
clock rate 128000
no shut
int e0/0
ip address 10.0.88.1 255.255.255.0
no shut
ip ospf priority 10
int loopback 0
ip address 10.10.10.10 255.255.255.0
exit
router ospf 101
network 10.0.66.1 0.0.0.0 area 0
network 10.0.88.1 0.0.0.0 area 0
ospf auto-cost reference-bandwidth 1000


$$$$$$$$$$$$$$$$$R-beta configuration

config t
int s0/0
ip address 10.0.66.2 255.255.255.0
bandwidth 128000
no shut
int e0/0
ip address 10.0.88.2 255.255.255.0
no shut
ip ospf priority 5
router ospf 101
network 10.0.88.2 0.0.0.0 area 0
network 10.0.66.2 0.0.0.0 area 0
ospf auto-cost reference-bandwidth 1000

$$$$$$$$$$$$$$$R-3600 ronfiguration

config t
int f2/0
ip address 10.0.88.3 255.255.255.0
no shut
ip ospf priority 0
router ospf 101
network 10.0.88.3 0.0.0.0 area 0
ospf auto-cost reference-bandwidth 1000

$$$$$$$$$$$$$$$$2950 configuration

config t
int vlan 1
ip address 10.0.88.10 255.255.255.0
ip default-gateway 10.0.88.1
no shut




*Mar 1 02:28:29.949: %OSPF-5-ADJCHG: Process 101, Nbr 10.0.88.3 on Ethernet0/0 from EXSTART to DOWN, Neighbor Down: Too many retransmissions
*Mar 1 02:28:43.103: %OSPF-5-ADJCHG: Process 101, Nbr 10.10.10.10 on Ethernet0/0 from DOWN to DOWN, Neighbor Down: Ignore timer expired
*Mar 1 02:29:29.951: %OSPF-5-ADJCHG: Process 101, Nbr 10.0.88.3 on Ethernet0/0 from DOWN to DOWN, Neighbor Down: Ignore timer expired




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Comments

  • mikej412mikej412 Member Posts: 10,086 ■■■■■■■■■■
    Can you ping? Do you have a duplex issue (check the interface stats, what kind of switch)?
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  • NetstudentNetstudent Member Posts: 1,693 ■■■□□□□□□□
    I have a question.

    Why did you use a BW of 128K on one serial link and 128,000K on the other link? Did you get mixed up with clock rate and BW?

    Can you post a routing table for Alpha and beta?
    There is no place like 127.0.0.1 BUT 209.62.5.3 is my 127.0.0.1 away from 127.0.0.1!
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  • aueddonlineaueddonline Member Posts: 611 ■■□□□□□□□□
    good point about the bandwidth, but it would only make a difference to the metric

    It's a 2950

    from r-alfa I can ping everything apart from r-beta

    and can't ping anything from r-beta
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  • NetstudentNetstudent Member Posts: 1,693 ■■■□□□□□□□
    This is kinda a long shot because I think you know your stuff, but do you have any MTU settings on the network that you forgot about?

    Also are you currently stuck in the EXSTART state? Any DBD packets flying around yet or did it not even get that far?

    Double check the switch config.
    There is no place like 127.0.0.1 BUT 209.62.5.3 is my 127.0.0.1 away from 127.0.0.1!
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  • aueddonlineaueddonline Member Posts: 611 ■■□□□□□□□□
    I turned it all off last night, and then back on thismorning

    R-beta was working fine and the 3600 was having the problem, so I changed the duplex on the switch and 3600 and then everything went to full.

    I don't get how r-beta could have been doing the same thing yesterday and 3600 today when I didn't change any config, but hey I guess if one things wrong it's gonna mess everything else up, maybe something to do with the DR election?
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  • happy420goluckyhappy420golucky Member Posts: 78 ■■□□□□□□□□
    aueddonline wrote:
    I turned it all off last night, and then back on thismorning

    R-beta was working fine and the 3600 was having the problem, so I changed the duplex on the switch and 3600 and then everything went to full.

    I don't get how r-beta could have been doing the same thing yesterday and 3600 today when I didn't change any config, but hey I guess if one things wrong it's gonna mess everything else up, maybe something to do with the DR election?

    Can anyone specify this symptom to be only related to a roter connecting to a switch via Fastethernet?
    Reason why I ask is: I tested out a similar scenario. I connected a 3750-"mtrj interface", gave it an svi interface and set it to half duplex. The port on the 4006 is set to full. Now, the svi is forming an adj with another router(full 100) that connected on that same 4006 switch but on a copper gigethernet port . The 3750 and the router were able to form full adj. What am I missing? icon_confused.gif:
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  • aueddonlineaueddonline Member Posts: 611 ■■□□□□□□□□
    Can anyone specify this symptom to be only related to a roter connecting to a switch via Fastethernet?


    The router I was having problems with yesterday had just an ethernet, I don't think the problem is suject to the speed of the link
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  • happy420goluckyhappy420golucky Member Posts: 78 ■■□□□□□□□□
    aueddonline wrote:
    Can anyone specify this symptom to be only related to a roter connecting to a switch via Fastethernet?


    The router I was having problems with yesterday had just an ethernet, I don't think the problem is suject to the speed of the link

    Ahh, well that explains it. I simply didn't pay close enough attention to your configs to realize that they were ethernet interfaces. Maaa bad. :)
    Every passing minute is a chance to turn it all around.
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