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dbuckley77
Beginner

Can't access single host on vlan from other vlans

We have an odd situation.  We have intervlan routing setup on our L3 core switches using a mixture of hsrp and vrrp.  On one particular vlan we can access all the hosts except for one from other vlans.  We can access this host while on the same vlan though.  I have checked the IP, netmask and gateway on the problem host.  All are correct and there does not appear to be anything wrong with the switchport that the host is plugged into.

It's set to static and when I changed it to another static IP on same subnet it still didn't work but when I change to dynamic IP it works and is accessible from other vlans.

Any ideas what's going on?

9 REPLIES 9
Georg Pauwen
VIP Expert

Hello,

can you post the output of 'sh interfaces' of the port in question ?

DPW-MDF1-2960#sh int gi0/37
GigabitEthernet0/37 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0024.50bc.1ea5 (bia 0024.50bc.1ea5)
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 9000 bits/sec, 13 packets/sec
37684 packets input, 27220381 bytes, 0 no buffer
Received 4492 broadcasts (297 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 297 multicast, 0 pause input
0 input packets with dribble condition detected
1351094 packets output, 137441305 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out

Odd. The port looks normal. Does that happen also when the host is connected to a different port on the switch ? What is the problem host, a Windows machine  ?

Have not tried another port on the switch. I'm thinking it's host related.  It is a Buffalo NAS.

Hello,

I have googled around, it seems that if you initialize the station with the function button and the power switch, it will restore a.o. the DHCP settings to their default...

http://forums.buffalotech.com/index.php?topic=10366.0

It does sound host related - probably either the mask or gateway are misconfigured when done statically.  Verify those carefully.

Try and reinstall the drivers of your NIC...

paul driver
VIP Mentor

Hello

Can you post the config if applicable and include the  hrsp/vrrp standby and statistics readout also

sh run
sh hrsp detail
sh hrsp standby
sh vlan bri
sh int trunk

Lastly tell us which vlan is the problem

res
Paul



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Krash Mole
Beginner

Hi,

try to reduce aging time for mac address on your mac table, check DHCP release time period.

Regards,