Cannot ping to VLAN interfaces on N4032

Hi there,

I was hoping you could help me figure out an issue. I'm using N4032 stack as a core switch with all the vlans and default gateways configured. I've enabled ip routing on the switch and set the route to the backbone router. So the connection is as follows:

n4032 ---------------- backbone_router
te1/0/19                  ether1

When I ping to the backbone router uplink interface on the switch (interface vlan 20) I am able to get a reply. However if I ping the management interface (interface vlan 280) I get TTL expired in transit message.

---------------------------------------------------------------

Pinging 10.10.20.2 with 32 bytes of data:
Reply from 10.10.20.2: bytes=32 time=3ms TTL=63
Reply from 10.10.20.2: bytes=32 time=3ms TTL=63
Reply from 10.10.20.2: bytes=32 time=4ms TTL=63
Reply from 10.10.20.2: bytes=32 time=3ms TTL=63

Ping statistics for 10.10.20.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 3ms, Maximum = 4ms, Average = 3ms

C:\Users\muhannad>ping 192.168.28.1

Pinging 192.168.28.1 with 32 bytes of data:
Reply from 10.10.20.2: TTL expired in transit.
Reply from 10.10.20.2: TTL expired in transit.
Reply from 10.10.20.2: TTL expired in transit.
Reply from 10.10.20.2: TTL expired in transit.

Ping statistics for 192.168.28.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

---------------------------------------------------------------

I tested connecting a PC to te1/0/1 port on the switch setting it to an access vlan 280 and I am able to ping the PC, which indicates that inter-vlan routing is working.

So any ideas as to why I can't ping the vlan interfaces on the switch except for one?

---------------------------------------------------------------

Here's a snippet of the configuration if you need to refer:

dr-coresw1#show running-config

!Current Configuration:
!System Description "Dell Networking N4032, 6.3.2.7, Linux 3.7.10-20383c08"
!System Software Version 6.3.2.7
!Cut-through mode is configured as disabled
!
configure
vlan 20,280,290
exit
vlan 20
name "v20-backbone-dr"
exit
vlan 280
name "v280-mgmt-dr"
exit
vlan 290
name "v290-lan-dr"
exit
ip telnet server disable
hostname "dr-coresw1"
slot 1/0 2 ! Dell Networking N4032
slot 1/1 6 ! Dell QSFP Card
slot 2/0 2 ! Dell Networking N4032
slot 2/1 6 ! Dell QSFP Card
sntp unicast client enable
sntp server "pool.ntp.org"
clock timezone 5 minutes 0 zone "MVT"
stack
member 1 1 ! N4032
member 2 1 ! N4032
exit
ip name-server "8.8.8.8"
system jumbo mtu 9216
ip routing
interface vlan 1
exit
interface vlan 20
ip address 10.10.20.2 255.255.255.252
exit
interface vlan 280
ip address 192.168.28.1 255.255.255.0
exit
interface vlan 290
ip address 192.168.29.1 255.255.255.0
exit
ip route 0.0.0.0 0.0.0.0 10.10.20.1
ip ssh server
spanning-tree priority 8192
application install SupportAssist auto-restart start-on-boot
!
interface Te1/0/1
description "link to computer system"
spanning-tree portfast
switchport access vlan 280
exit
!
interface Te1/0/2
spanning-tree portfast
switchport mode trunk
exit
!

--- snipped ----

interface Te1/0/19
description "uplink to backbone router"
spanning-tree portfast
switchport access vlan 20
exit
!

--- snipped ---