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Trapped device

wstemmons1984
Level 1
Level 1

Hello,
I have a situation where a device that's in vlan A isn't accessible to the network. I have a 2960x switch. Two ports are configured for vlan A. A device with a static IP address for vlan A isn't reachable outside of the switch. The only way to reach the device is to connect to the other port on the switch that is in vlan A with my laptop. I gave the laptop a static IP address for vlan A. Vlan A can't communicate to it's default gateway. I was not able to ping any devices in vlan A outside of the switch, only the device that is connected to the other vlan A port on this switch. When I remote into the switch, I can ping other devices on vlan A. I can also reach the default gateway for vlan A. Below you will find a partial switch configuration, and the switchport config. the results of traceroute.

version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
!
ip dhcp snooping vlan 10,40,105,108,110,115,126,160,180,182,300,310,410
no ip dhcp snooping information option
ip dhcp snooping
no ip domain-lookup
ip domain-name xxx.int
vtp domain xxxx
vtp mode transparent
!
spanning-tree mode pvst
spanning-tree extend system-id
auto qos srnd4
!
vlan internal allocation policy ascending
!
vlan 305,310,315,320
!
!
class-map match-all AUTOQOS_VOIP_DATA_CLASS
match ip dscp ef
class-map match-all AUTOQOS_DEFAULT_CLASS
match access-group name AUTOQOS-ACL-DEFAULT
class-map match-all AUTOQOS_VOIP_SIGNAL_CLASS
match ip dscp cs3
!
policy-map AUTOQOS-SRND4-CISCOPHONE-POLICY
class AUTOQOS_VOIP_DATA_CLASS
set dscp ef
police 128000 8000 exceed-action policed-dscp-transmit
class AUTOQOS_VOIP_SIGNAL_CLASS
set dscp cs3
police 32000 8000 exceed-action policed-dscp-transmit
class AUTOQOS_DEFAULT_CLASS
set dscp default
police 10000000 8000 exceed-action policed-dscp-transmit
!
interface FastEthernet0
no ip address
interface GigabitEthernet2/0/45
switchport access vlan 305
switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security
ip device tracking maximum 7
srr-queue bandwidth share 1 30 35 5
priority-queue out
spanning-tree portfast edge
spanning-tree bpduguard enable
!
interface GigabitEthernet2/0/46
description HVAC Controller
switchport access vlan 305
switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security
ip device tracking maximum 7
storm-control broadcast level 10.00
storm-control action shutdown
spanning-tree portfast edge
spanning-tree bpduguard enable
!
interface GigabitEthernet2/0/49
switchport mode trunk
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust cos
auto qos trust
ip dhcp snooping trust
!
interface GigabitEthernet2/0/50
!
interface TenGigabitEthernet2/0/1
switchport mode trunk
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust cos
auto qos trust
ip dhcp snooping trust
!
interface TenGigabitEthernet2/0/2
switchport mode trunk
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust cos
auto qos trust
ip dhcp snooping trust

interface Vlan1
no ip address
shutdown
!
ip default-gateway 10.10.0.1
ip http server
ip http secure-server
!
!
ip access-list extended AUTOQOS-ACL-DEFAULT
permit ip any any
!
line con 0
password 7 03451A0F5646740D07
line vty 0 4
exec-timeout 0 0
password 7 054A470B71051B4850
length 0
line vty 5 15
!
ntp peer 10.10.0.1
!
end

Next is the results of traceroute to devices on vlan A
Tracroute Results
ADMN2-0216-2960-ASTACK-089#traceroute 10.11.5.22
Type escape sequence to abort.
Tracing the route to 10.11.5.22
VRF info: (vrf in name/id, vrf out name/id)
1 10.10.0.1 10 msec * 4 msec
2 10.11.5.22 3 msec 0 msec 3 msec
ADMN2-0216-2960-ASTACK-089#traceroute 10.11.5.21
Type escape sequence to abort.
Tracing the route to 10.11.5.21
VRF info: (vrf in name/id, vrf out name/id)
1 10.10.0.1 3 msec * 3 msec
2 10.11.5.21 14 msec 4 msec 0 msec
ADMN2-0216-2960-ASTACK-089#traceroute 10.11.5.23
Type escape sequence to abort.
Tracing the route to 10.11.5.23
VRF info: (vrf in name/id, vrf out name/id)
1 10.10.0.1 0 msec * 0 msec
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
I stopped the trace after 10 attempts.
I am not sure as to what I should troubleshoot next or a possible cause.
I need help from the community to solve my issue. I need the device in vlan A to communicate outside the switch. 
Thank you Warren.

3 Replies 3

balaji.bandi
Hall of Fame
Hall of Fame

What VLAN IP is this belong to - 10.11.5.23, what is the Gateway for this IP ?

 

The switch config you posted, simple Layer2, you do not have any routing configured.

 

So the Routing taking place on your Uplink Device, which is connected to this device ?

 

from PC can you post ipconfig / all screenshot, and what is the gateway for this IP 10.11.5.23 

 

BB

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vlan A has a gateway of 10.11.5.1 and 10.11.5.23 is the device on vlan A. I can ping the gateway from the switch but not from a port assigned vlan A. 

We need more information as suggested, what is the port config? what is the switch config?

 

is the Gateway is directly connected switch or another device? Do you have a route back to switch for return traffic?

 

BB

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