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01-12-2014 10:31 PM - edited 03-07-2019 05:31 PM
Dear Support Engineers,
I am new in cisco field, i make a simple topology and below is the configuratons:
R1#show ip int brief
Interface IP-Address OK? Method Status Protocol
Serial1/0 12.1.1.1 YES manual up up
Serial1/1 13.1.1.1 YES manual up up
Loopback0 1.1.1.1 YES manual up up
R1#show ip route
Gateway of last resort is not set
C 1.0.0.0/8 is directly connected, Loopback0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.0.0.0/8 is directly connected, Serial1/0
C 12.1.1.2/32 is directly connected, Serial1/0
13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 13.0.0.0/8 is directly connected, Serial1/1
C 13.1.1.3/32 is directly connected, Serial1/1
This output is confusing for me, it is veriably subnetted. I search alot on google to get the solution but failed, now looking forward to you.
I want this result as:
R1#show ip route
Gateway of last resort is not set
C 1.0.0.0/8 is directly connected, Loopback0
C 12.0.0.0/8 is directly connected, Serial1/0
C 13.0.0.0/8 is directly connected, Serial1/1
Your quick response will be very appreciated.
Thanks & Best Regards
Tayyab Arif
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01-13-2014 04:18 AM
When you're using ppp encapsulation, the default is to use a peer route which is where you see your /32. On your serial interface, enter "no peer neighbor-route", shut and no shut your interface and the /32 should be gone.
HTH,
John
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01-13-2014 03:22 AM
The IP addresses on the Serial Interfaces are Class A so have a default subnet mask of 255.0.0.0 which is a /8 which is shown in the Routing Table.
If you do a #show ip route connected you should just see the connected routes:
C 1.1.1.1/32 is directly connected, Loopback0
C 12.1.1.0/30 is directly connected, Serial0/3/0
C 13.1.1.0/30 is directly connected, Serial0/3/1
Thanks
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01-13-2014 03:35 AM
Dear Davils,
I find the same issue again, result is mentioned below
R1#show ip route connected
C 1.0.0.0/8 is directly connected, Loopback0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.0.0.0/8 is directly connected, Serial1/0
C 12.1.1.2/32 is directly connected, Serial1/0
13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 13.0.0.0/8 is directly connected, Serial1/1
C 13.1.1.3/32 is directly connected, Serial1/1
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01-13-2014 04:09 AM
Can you post the full config of R1 ?
Jon
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01-13-2014 04:20 AM
Kindly find the configurations
R1#show running-config
Building configuration...
Current configuration : 1189 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
memory-size iomem 5
ip subnet-zero
no ip icmp rate-limit unreachable
ip cef
ip tcp synwait-time 5
!
!
!
!
no ip domain lookup
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.1.1.1 255.0.0.0
!
interface Serial1/0
ip address 12.1.1.1 255.0.0.0
encapsulation ppp
serial restart-delay 0
clock rate 64000
!
interface Serial1/1
ip address 13.1.1.1 255.0.0.0
encapsulation ppp
serial restart-delay 0
clock rate 64000
!
ip classless
!
no ip http server
no ip http secure-server
!
!
!
control-plane
!
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end
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01-13-2014 04:22 AM
Tayyab
John is spot on. Could you mark the answer provided by John as correct so others who may have the same issue will be able to find the answer here.
Jon

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01-13-2014 04:18 AM
When you're using ppp encapsulation, the default is to use a peer route which is where you see your /32. On your serial interface, enter "no peer neighbor-route", shut and no shut your interface and the /32 should be gone.
HTH,
John
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01-13-2014 04:25 AM
Issue solved.
Thanks John Blakley....!
