07-25-2018 05:00 AM - edited 03-08-2019 03:44 PM
Good Day,
I have installed Cisco 3560 Core Switch and 4 2960x department Switches running VLAN
When i ping default VLAN to VLAN then ms is shoiwng ok as below but to VLAN 10,20,30 is showing high ms.
Default VLAN result
Pinging 192.168.0.10 with 32 bytes of data:
Reply from 192.168.0.10: bytes=32 time<1ms TTL=128
Reply from 192.168.0.10: bytes=32 time<1ms TTL=128
Reply from 192.168.0.10: bytes=32 time<1ms TTL=128
Reply from 192.168.0.10: bytes=32 time=1ms TTL=128
Default VLAN to VLAN10 Result.
Pinging 192.168.40.15 with 32 bytes of data:
Reply from 192.168.40.15: bytes=32 time<10ms TTL=63
Reply from 192.168.40.15: bytes=32 time=13ms TTL=63
Reply from 192.168.40.15: bytes=32 time=24ms TTL=63
Reply from 192.168.40.15: bytes=32 time=21ms TTL=63
Could you please let me the recommendation action to solve this issue ?
07-25-2018 05:24 AM - edited 07-25-2018 05:24 AM
Hi,
It could be a layer 1 issue, NIC or cabling, have you tried ping to device in other vlan over the same switch where you are making ping? or disabling antivirus? other reason could be if the destination is using wireless connection.
07-25-2018 05:46 AM
Thank you Julio for reply,
I have tried to ping in SAME VLAN like 192.168.10.2 to 192.168.10.3, or default 192.168.0.1 to 192.168.0.2 no issue,
but from source computer 192.168.0.2 to desti computer 192.168.10.2 is showing 10 to 30 ms
07-25-2018 05:43 AM
Hello,
in addition to Julio's remarks, you might want to check if the core switch is the root for your VLANs. On the 3560, issue the command 'show spanning-tree vlan' for all VLANs and check for the line 'This switch is the root'...
07-25-2018 06:08 AM
HI Georag,
Thank you for replying,
i have check with show spanning-tree vlan 1default/V20/V30 on core switch and found 23 port showing
"Root FWD 4"
07-25-2018 06:19 AM - edited 07-25-2018 06:20 AM
Hi
You could use this command to follow the ports and reach the root:
show spanning-tree vlan <your vlan> root detail
example:
show spanning-tree vlan 10 root detail
07-25-2018 07:59 AM
07-25-2018 08:37 AM
Hi
I have had this issue before, but other solution is to use a compact flash reader, connect it to your computer and load the image, then install the CF on the Router and turn it on.
07-25-2018 06:21 AM
Post the full output for the command (for each VLAN)
show spanning-tree vlan
07-25-2018 06:28 AM
show spanning-tree vlan 1
Gi0/21 Desg FWD 4 128.21 P2p
Gi0/22 Desg FWD 4 128.22 Edge P2p
Gi0/23 Root FWD 4 128.23 P2p
Gi0/24 Desg FWD 4 128.24 Edge P2p
show spanning-tree vlan 10
Gi0/9 Desg FWD 4 128.9 P2p
Gi0/18 Desg FWD 4 128.18 P2p
Gi0/20 Desg FWD 4 128.20 P2p Peer(STP)
Gi0/21 Desg FWD 4 128.21 P2p
Gi0/23 Root FWD 4 128.23 P2p
show spanning-tree vlan 20
Gi0/9 Desg FWD 4 128.9 P2p
Gi0/18 Desg FWD 4 128.18 P2p
Gi0/20 Desg FWD 4 128.20 P2p Peer(STP)
Gi0/21 Desg FWD 4 128.21 P2p
Gi0/23 Root FWD 4 128.23 P2p
07-25-2018 07:16 AM
Hello,
if this is the output from the core switch, it means the core switch is not the root (the root switch has only designated ports).
Try and set the root manually for all VLANs:
spanning-tree vlan x root
So you end up with only designated ports on the core switch.
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