14
votes
Accepted
How many stack cables would be needed if we want to stack two 3850 switches
How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be ...
- 27.2k
7
votes
Accepted
Is possible to stack/uplink different brands of switches using SFP?
Yes you can uplink different brand of switches using SFP.
The term stacking in this context means that several switches act as a single one. This is always a proprietary (and model dependent) feature,...
- 19.5k
7
votes
Accepted
Remove switch provisioning from individual switches
You need to un-provision the removed switch(es) and renumber the current one to be the 1st switch.
Your two switches are now standalone switches. In fact, each of them has turned into a single-switch ...
- 3,754
7
votes
How many stack cables would be needed if we want to stack two 3850 switches
A stack should be connected in a loop, with a stack cable for each switch. With two switches, that would be two stack cables, three switches three stack cables, etc. that means Switch 1 connects to ...
- 98.7k
5
votes
Cisco 3750 switch stack with different IOS images
You should really set the IOS version to be the same before adding a switch to the stack. Basically, the switches need to have the same stack protocol version, and only switches with the same IOS ...
- 98.7k
5
votes
Accepted
Endpoint MAC address change detection
A host (Windows or any other) tries to keep its ARP table accurate by as many means as it can. Normally there is a timeout for the cache entry and it's just discarded after a period since it had ...
- 16.2k
5
votes
Accepted
Adding a new switch to a C9300 stack
The order in which the switches are physically connected does not matter to the configured switch number. The switches are connected in a loop, so there is really no top or bottom, even if there is a ...
- 98.7k
4
votes
Accepted
Updating config on 2960s Stack by copying from FTP
If you are reloading, you want to replace the startup configuration, not the running configuration. Otherwise, the device will start up with the old startup configuration, which is stored on nvram:.
...
- 98.7k
4
votes
Endpoint MAC address change detection
Entries in the ARP table have a limited lifetime.
When they are outdated, the ARP process remove them from the table and the next time it needs to communicate with the associated IP address, it will ...
- 19.5k
4
votes
Accepted
LAG links between access switch and stacked switches
Assuming the stacked switches behave like a single unit (not all do), connecting two links between access switch and stack creates a bridge loop, bringing down your network.
One approach for getting ...
- 82.6k
3
votes
Accepted
C3850 switch active/standby question
The Active switch is the one which is the current master of the stack. Priority 15 is the highest priority, and the highest priority will be the master. If the master fails, the next highest priority ...
- 98.7k
3
votes
2-stacked switches with 2 uplinks to each ASA
Using a 2nd Uplink and using link aggregation (etherchannel) is the right way to go. Keep in mind that your throughput problems might be due to the ASAs limitations (which model do you use?)
Another ...
- 767
3
votes
Remove switch provisioning from individual switches
Have you tried the following?
If you remove a provisioned switch from the switch stack, the configuration associated with the removed stack member remains in the running configuration as provisioned ...
- 533
3
votes
Theoretical: Bottleneck in a switch stacking environment
With a 10 Gbit/s uplink, 10 Gbit/s stack interlinks and only 100 Mbit/s edge ports the uplink bottleneck is rather theoretical.
48 FE ports on each switch can transport an aggregate, peak edge-to-...
- 82.6k
3
votes
Switch Stacking and Redundancy
In theory, a hardware failure on one member of a switch stack will only cause the physical interfaces of that member switch to go down. Uplinks and access ports on other switches will remain online. ...
- 2,183
3
votes
Understanding the Role of Member Device in Cisco 3850 VSS Stack
You are correct. Switch number one is neither the active or the standby.
If switch 3 were to fail, switch 1 would become the new standby.
- 67.1k
2
votes
Stacking Cisco Catalyst 3850 via Fibre?
This answer probably won't very useful today, but it's possible to stack 2960X via fiber. You need C2960X-FIBER-STK.
- 21
2
votes
Upgrading Cisco 500 series stackable switches in stacking mode
The 500_Series_Admin_Guide.pdf states the following:
There are two different ways to update images across the stack:
• Image can be updated prior to connecting a unit to the stack. This is the
...
- 21
2
votes
Accepted
Dell PowerConnect 5524 - SNMP OID for stack topology
Dell has the rlstack.mib. It doesn't seem to exist online (anymore), but can be retrieved from the firmware on Dell Support, or I posted a copy on Gist.
Try using a snmpwalk on .1.3.6.1.4.1.89.107 ...
- 319
2
votes
Accepted
Add stacking modules to powered on GSM7252PS
Netgear's official answer is to power off the device before adding HSM cards. From GSM7228PS/GSM7252PS Product Information | Answer | NETGEAR Support
What are the two I/O modules for?
There are ...
- 319
2
votes
HP ProCurve Stacking
Normally, if you nest telnet sessions, you just need to exit the last one to get back to the previous one. In your case, the chain would be Putty->Commander->Member. By exiting the Member session, you'...
- 2,249
2
votes
Stack switch with HSRP for Gateway redundancy
HSRP would be configured on the ISP side, not your side.
The switch will look and be configured like a single switch.
You will use the no switchport command on the two interfaces to the ISP. Each ...
- 98.7k
2
votes
Accepted
Netgear SFP and trunking between three switches
What you are running into isn't a trunking problem. This behavior is what STP does in order to prevent loops. STP will create a loop-free layer-2 by sending BPDUs to determine the possible paths to ...
- 98.7k
2
votes
One of a switch in a stack is frozen
First, there is a chance that resetting a single switch in the stack will affect the entire stack. A worst case senario is the whole stack reboots. So, plan for a stack outage and do the work ...
- 4,389
2
votes
Accepted
Stacking master and member correctly
According to Cisco guide, the switch with higher priority value should become the stack master, but looks like it does not work in this case.
You can try (check if it works after each step, make sure ...
- 3,754
2
votes
Interface suspended when linking access to core
Hi I haven't got a reputation score of 50 yet so can't add to the comments... But following on from what @Cown was saying here are the guidelines from Cisco:
All ports must be identical:
- Same speed ...
- 100
2
votes
D-Link Stacking
While I'm not familiar with that specific switch, there's basically two or three scenarios:
The switch configuration is wiped on both switches when you enable stacking.
The switch configuration is ...
- 2,249
Only top scored, non community-wiki answers of a minimum length are eligible