Cant ping with 10.0.0.0 network L3 Multilayer Switch

dorayaki · ‎10-21-2021

Hi, Im new.

I got a problem with L3 Switch, one of my vlan cant ping when using 10.0.0.0/24 as network. It works just fine when I changed the network address to 30.0.0.0 and 192.168.2.0. I havent tried other address but im pretty sure its just doesnt work with 10.0.0.0 network.

Setup is 2 pc to 1 switch

PC1 - Vlan10 | 192.168.1.150

PC2 - Vlan20 | 10.0.0.4

Switch port :

Gi0/1 - 192.168.1.1

Gi0/0 - 10.0.0.1

Gi1/1 - 11.22.33.2 (to outside)

PC1 can ping with any of the switch interface and outside network but PC2 wont able to do unless i changed the network other than 10.0.0.0

Thanks !

!
hostname Switch
!
boot-start-marker
boot-end-marker
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no aaa new-model
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ip cef
no ipv6 cef
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spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
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!
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interface GigabitEthernet0/0
 switchport access vlan 20
 switchport mode access
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/1
 switchport access vlan 10
 switchport mode access
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/3
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/0
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/1
 no switchport
 ip address 11.22.33.2 255.255.255.252
 negotiation auto
!
interface GigabitEthernet1/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/3
 media-type rj45
 negotiation auto
!
interface Vlan10
 ip address 192.168.1.1 255.255.255.0
!
interface Vlan20
 ip address 10.0.0.1 255.255.255.0
!
router ospf 1
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ip forward-protocol nd
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no ip http server
no ip http secure-server
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control-plane
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banner exec ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
banner incoming ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
banner login ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
!
line con 0
line aux 0
line vty 0 4
!
!
end

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Georg Pauwen · ‎10-21-2021

Hello,

looks like you are doing this is GNS3 ?

Georg Pauwen · ‎10-22-2021

Hello,

I just tested this on an IOSv switch, everything works fine on this one. Can you post the output of:

show ip route

show ip interface brief

and turn on 'debug ip icmp' then post the output when you ping from the 10.0.0.4 IP address ?

paul driver · ‎10-22-2021

Hello

switch:
conf t

ip routng
vlan10,20
exit

test again

Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Georg Pauwen · ‎10-22-2021

@paul driver

'ip routing' is enabled by default on the IOSvL2 switches, it doesn't show up in the running config, it only shows up when you disable it (no ip routing)...