08-02-2006 12:29 AM - edited 03-03-2019 04:19 AM
hello
can anyone tell me Cisco's recommendations for the following
1 cisco 2950T (c2950-i6k2l2q4-mz.121-22.EA7) connects into a 3750 (c3750-i5-mz.122-20.SE).
the link is switchport mode access. the config for the link on the 3750 is
switchport access vlan 171
switchport mode access
on the 2950 the link is configured as
switchport access vlan 171
the link works fine and when i check the link interfaces on both 3750 and 2950, its reported as being an access link. the question is - should i be using the same config at both ends (ie adding switchport mode access to the 2950)
2 same set up as above - link set for auto-negotiation and negotiates 1000 Full-Duplex. should i be specifying Speed/Duplex for the link and if so should both ends of the link be specified.
although the link works fine, i'd just like to make it bombproof .
thanks
andy
08-02-2006 12:42 AM
Hello Andy,
The main difference between the two is that the first is explicitly configured in access mode ( ie can never become a trunk ). The other is a dynamic port that can transition into either access or trunk mode which depends on the configuration of the link partner.
For consistancy you can configure the switches identically.
interface FastEthernet0/1
description connected to switch xyz
switchport
switchport mode access
switchport access vlan 171
In case no configuration for speed and duplex exist, auto is the default. If you link supports gigabit ethernet on both ends, the switch will negotiate 1000-full. In case you want to make shure they negotiate speed and duplex to 1000-full, you specify it in interface configuration mode.
interface FastEthernet0/1
speed 1000
duplex full
HTH
--Leon
* Please rate posts.
08-02-2006 12:51 AM
thanks leon
i'll duplicate the switchport/speed/duplex settings at both ends of link.
08-02-2006 01:43 AM
On Cisco 2950 the default port mode is dynamic desirable - it forms trunk with dynamic auto and trunk port onyl anyway it is in access mode, like in your case.
bye
FCS
Please rate me if I helped.
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