4
votes
Cisco native port has to be included in allowed vlans of trunk
Reference:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/AccessTrunk.html#18749
Emphasis mine:
By default, a trunk port sends ...
- 2,831
4
votes
Accepted
LACP Trunk from Cisco to Fortinet
If the way i have done is not true LACP, how come it is working with the Fortinet (which is set for 802.3ad Aggregate)? Seems setting channel-protocol lacp on my ports makes no difference (is it LACP ...
- 1,237
3
votes
Accepted
What is wrong with ESXi VMKernel Port in Active/Active configuration?
The management vmk in ESXI assumes the MAC address of the Nic in the first PCI slot during the initial set-up. This is how it has worked forever. This can break things only when the physical device ...
- 46
3
votes
Cisco native port has to be included in allowed vlans of trunk
The reason i ask i saw other configs in forums is they did not include
the native VLAN in the list of allowed VLANs, i saw in a couple of
places and wanted to check if a typo.
The one big reason ...
- 3,213
2
votes
If you switch an interface's vlan does it stop traffic?
The answer is Yes and No. You can make the changes, BUT hosts and devices won't be able to communicate with each other until and unless the ports they're connected to are members of the same VLAN. So ...
- 109k
2
votes
Accepted
Host flapping between switchport and Etherchannel
Yes there is a problem and you are one step away from making a loop, but its not because of keeping Po1 and interface connected to the router in the same VLAN. When you Stack two switches, They work ...
- 1,290
2
votes
How do I change my password on a Cisco Catalyst 2960 switch?
switch>enable
switch# config t
Switch(config)#username gozulin privilege 15 password yourpassword
Switch(config)end
switch# wr
Note#1: you don't need to enter 0 or 7 --- try that.
Privilege 15 ...
- 21
2
votes
What is wrong with ESXi VMKernel Port in Active/Active configuration?
I have run an extremely similar setup for many years without any issues.
How have you configured the switch ports? You shouldn't do anything special (no (M)LAG/LACP) since ESXi takes care of ...
- 9,232
2
votes
Accepted
Is physical connection sufficient to register a MAC address to a switch?
Working link is not sufficient for working MAC level.
Consider different VLANs to be very similar to different cabling and a switch. So you need to have a proper (tagged) VLAN for both your computer ...
- 257
2
votes
Accepted
Cisco Catalyst "Traffic Spanning" not working, multiple methods attempted, not sure what to try next
Based on the comments, it seems that you had not created the VLAN in the VLAN database on the switch.
Not creating VLANs with the global vlan command for a stand-alone switch is a common source of ...
- 3,213
1
vote
802.1q multicast blocked by Cisco router
That particular switch model does not allow tagging of the native VLAN, per the Cisco documentation:
General Restrictions
Native VLAN tagging is not supported, and the vlan dot1q tag native ...
- 3,213
1
vote
What is wrong with ESXi VMKernel Port in Active/Active configuration?
The switch port config that you posted shows that you are using a port channel on the catalyst switches.
Just don't do that! With standalone ESXi hosts this is not supported. ESXi takes care of load ...
- 1,498
1
vote
Cisco native port has to be included in allowed vlans of trunk
The NATIVE VLAN should NOT be included on the "switch allowed vlan" list. However, the NATIVE VLAN should also NOT be used for ANYTHING else. If you have a vlan defined for any device/access port, ...
- 11
1
vote
LACP Trunk from Cisco to Fortinet
If the way i have done is not true LACP, how come it is working with
the Fortinet (which is set for 802.3ad Aggregate)? Seems setting
channel-protocol lacp on my ports makes no difference (is it ...
- 3,069
1
vote
Trying to use Azure AD as LDAP server with Cisco Catalyst IP Base
Azure Active Directory supports various authentication APIs and protocols, but LDAP isn't amongst them.
However, Azure AD Domain Services (currently in preview) will be able to help you here, because ...
- 69.5k
1
vote
"route" sub-command does not exits in "ip" command on Cisco 2960-S
It depends on the software features of the Switch what options are available.
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-2960-s-series-switches/data_sheet_c78-726680.html
...
- 8,941
1
vote
"route" sub-command does not exits in "ip" command on Cisco 2960-S
The 2960-S is a layer 2 switch. If you need routing between VLANs, you need a router.
- 31.4k
1
vote
Accepted
Catalyst 2960-X no xmodem or tftp transfer
Turns out it was the bin file on the PC that was corrupted. I extracted it again from the tar archive and now it's uploading. Sigh. Always return to zero when you're stuck.
1
vote
cisco 5548 - version 5.2 equivalent command to "service unsupported-transceiver"
Unfortunately the new switches do not support these commands for shady SFP/SFP+'s. It has always been a unofficial command anyway. If the command is not there, the only thing you can do is to tweak ...
- 1,508
1
vote
Sending IOS .bin file to Cisco 3750 Catalyst Using TeraTerm (xmodem)
I think you are not doing the copy xmodem: flash: command on the switch before trying to send the file. Also, make sure that you have a block with enough free space on the switch flash. You may need ...
- 3,213
1
vote
Accepted
How Can I Have 1 Device Ignore Cisco Default Route?
You can't point to a default gateway that is outside of your local broadcast domain. i.e. if you have an IP address of 192.168.0.10/24 then your default gateway must be inside that network. That's the ...
- 68.6k
1
vote
Accepted
Cisco IP Redirection (static NAT?) for non existant IP Range
Translate a whole network range is possible by using static NAT (aka Net Static).
Anyway the problem here is that old network is a /8, while the new can be 172.16.0.0/12 at most (you forgot to specify ...
- 226
Only top scored, non community-wiki answers of a minimum length are eligible