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Results tagged with cisco
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user 657
The major provider of networking equipment. This is a generic tag to be used when no more specific tags are available. See the list of tags in Help Center Tag page.
1
vote
1
answer
402
views
Should DHCP Snooping trigger errdisable
I'm using Cisco 3750s, with DAI and DHCP Snooping enabled. …
- 688
3
votes
1
answer
854
views
Enabling dhcp snooping on Cisco 3750 running DHCP server?
I have been considering enabling the ip dhcp snooping option to avoid potential issues with users attaching wireless access points and the like.
All of the examples I've seen show using a trusted VL …
- 688
3
votes
2
answers
183
views
Finding a lost device
The switches are Cisco 3750X.
Usually I'd just run a sh arp and sh mac address-table to identify the port of a problematic device, but I'm not seeing any entries here. …
- 688
4
votes
Accepted
Finding a lost device
So.. I did some additional digging on this. Apparently there are a lot of models of Xerox printers / scanners / etc (7855, C60, EX7750....) that have the default IP of 100.100.100.101.
I just had th …
- 688
19
votes
5
answers
19k
views
Should portfast be used on a port potentially connecting to an unmanaged switch?
I understand the basics of how spanning tree works and why you would want to use portfast on user access ports.
When dealing with a topology with a large number of dumb switches under desks and othe …
- 688
5
votes
1
answer
287
views
malloc failures and ARP packed on a Cisco 2901
I have a 2901 between a network and the internet. It shipped with the routing defined as follows.
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1
Using the interface like this instead of an IP struck …
- 688