Switch management vlan IP unreachable

[MrBeginner]

Dear All,

let me know why my switch management IP cannot ping from anywhere.MY pc can ping to router and vlan interfaces.router can ping vlan interface itself. router cannot ping to  switch management IP. Router Model is c892 and switches model is ws-c2960+24tc-s (LanLite).

Switch have have 4 vlan and carry traffic with trunk to router and router have 4 vlan interfaces.(i didn't use router on the stick .

let me know which IP should i need to set as ip default-gateway? 

i set management interface ip as default gateway in switches but cannot solve.

PLease see below config and help me to solve.

Router config:

vlan 20

vlan 21

vlan 22

vlan 23

vlan 77

interface Vlan20

description management vlan
ip address 1.1.8.1 255.255.255.0
!
interface Vlan21
ip address 1.1.7.1 255.255.255.0
!
interface Vlan22
ip address 1.1.6.1 255.255.255.0
!
interface Vlan23
ip address 1.1.5.1 255.255.255.0

nterface GigabitEthernet7
description LAN LINK to Switch
switchport trunk native vlan 77
switchport trunk allowed vlan 1,2,20-24,1001-1005
switchport mode trunk

Switch Config:

vlan 20

discription management vlan

vlan 21

vlan 22

vlan 23

vlan 77

interface Vlan20
description MGMT VLAN
ip address 1.1.8.100 255.255.255.0

interface range Gi 0/1
description UPLink to Router
switchport mode trunk
switchport trunk allowed vlan 20,21,22,23,24,1,1002,1005

[Jon Marshall]

Can you post a "sh ip int br" from both devices. 

Jon

[Deepak Kumar · Accepted solution]

Hi,

There will not things:

1. Check your switch configuration, If there is a command "IP routing" then you must remove the command (no ip routing) first. 

2. "IP default-gateway 1.1.8.1" must be configured on the switch means VLAN 20 Gateway IP.

Last thing: There is interface configuration is also showing a VLAN mismatch. 

Regards,

Deepak Kumar

[MrBeginner]

hi,

i am showing sample config.in my real device i use /27 for all VLAN.for example. I use 10.1.8.0/27 for vlan200,10.1.8.64/27 for vlan201,10.1.8.94/27 for vlan 202 (mgmt network).If i use vlan 200 as mgmt network and use 10.1.8.1 as gateway,i can reachable to switch and swich can ping anywhere.but if i use other vlan as mgmt net,switch cannot reach anywhere.

[Jon Marshall]

Best to show real configuration in future. 

If you use a different vlan for management are you also changing the default gateway to an IP from the new subnet ? 

Jon

[Deepak Kumar]

Hi,

Please post complete configuration and hopping that you missed a command on the switch:

ip default-gateway 1.1.8.1

[absuizo14]

This maybe a stupid question but why do you have a trunk interface and vlans on your router? Switch port modules?

[Deepak Kumar]

Hi,

A trunk interface is used to carry multiple VLAN traffic on a single interface. In your case, you used trunk port because you want to carry VLAN 2, 20, 21, 22 etc on a single interface. 

[Richard Burts]

There was a request for the output of show ip int brief from both devices. I believe that this output would be helpful. In addition would the original poster give us the output of show cdp neighbor from both devices and the output of show interface status from the switch?

HTH

Rick