2014年2月25日星期二

how to copy the confi from 2900 series to another one

I know we can use copy & Paste, my Cisco 2921 price    questions are:

1.       Before that, do I need to wipe out the existing confi on the brand new switch?
2.       About using TFTP, how does this new switch connects to the TFTP? Does it mean I have to assign a real IP and put it on our network? More details, pls

•1.       Before that, do I need to wipe out the existing confi on the brand new switch?
     Answer:  I always ersase the default configuration on the switch by doing "er startup" and then reloading the switch

•2.       About  using TFTP, how does this new switch connects to the TFTP? Does it mean  I have to assign a real IP and put it on our network? More details, pls
     Answer: Multiple ways you can use test network, you can assign it a static IP on the network and move the config from the other switch to this one or let it grab an IP from the DHCP and then move the config from the other switch to this one.  You can simply setup the other switch you are replacing as a tftp server to copy the config  Cisco 2951 price   to the new

2014年2月24日星期一

3560 switches, differences

I have been looking at deploying a small core switch design for an important branch office that would consist of 2 cores with an etherchannel link and then 4 POE access switches linked to both cores utilising STP. I will also want static IP routing on the cores and will set up HSRP for gateway failover.

The initial switch I looked at for the core was WS-C3560X-24T-L    however after finding that there is no stock around of this at the moment I have seen the WS-C3560X-24T-S which looks like it will do everything I need including IP routing, HSRP and QoS for VOIP. The thing that concerns me is this is about £1000 cheaper so i'm slightly worried im missing someting. Any help in identifying this would be much apprciated?

First of all 3560E are end of life and the 3560X is the replacement for it so you should go for it. Don't believe you will have any feature shortcomings.

Basically I understand 3560X are an evolution of 3560E  switches. But they have some modularity. 3560X you won't  have gigabit  or 10gigabit uplinks unless you order them if you need to. 3560E came  with fixed 10gigabit uplinks.
I also read somewhere that 3560X are more energy efficient.

From 3560X Q&A 2nd question:

Q. What is new in the Cisco Catalyst 3750-X and 3560-X Series Switches?
A. The Cisco Catalyst X-Series switches build on the E-Series switches and add the following features:
• Cisco StackPower™  technology, available only on the Cisco Catalyst 3750-X (requires IP  Base), manages power very efficiently by aggregating and sharing power  supplies across a stack of switches. It also supports a feature known as  Zero-Footprint RPS.
• Field-replaceable network module provides 4 x 1 Gigabit and 2 x 10 Gigabit uplink interfaces for the switch.
• Full 802.3at PoE+ support provides 30W per port on all 48 ports in a single rack unit (RU) switch.
• New LAN Base feature set offers comprehensive Layer 2 functionality.
• Dual redundant power supplies and fans:  Four high-efficiency power supply options are available, including a DC  power supply for PoE applications. Two redundant, field-replaceable fan  modules are also included.
• MACsec  provides hardware-based encryption (802.1ae) at line rate on all 48  ports (requires IP Base) WS-C3560X-24T-S    . Includes MACsec Key Agreement (MKA) (included  in Dot1X-rev).

2014年2月19日星期三

3750 vlan interface

Is there way to WS-C3750V2-24TS-S   create a vlan interface that wouldn't be routed, like on a layer 2 switch ?

I'd like to use this interface on a layer 2 isolated network, only to managed the c3750 by ssh.

ardhuin-s wrote:

sorry, I wasn't clear about the deploment :

I have a c3750 stack with 10vlans and 8 interfaces vlan :

Vlan1                  10.114.253.254  YES NVRAM  up                    up     

Vlan2                  10.114.1.254    YES NVRAM  up                    up     

Vlan10                 10.114.10.254   YES NVRAM  up                    up     

Vlan11                 10.114.11.254   YES NVRAM  up                    up     

Vlan12                 10.114.12.254   YES NVRAM  up                    up     

Vlan249                10.114.249.254  YES NVRAM  up                    down   

Vlan250                10.114.250.254  YES NVRAM  up                    up     

Vlan252                10.114.252.254  YES NVRAM  up                    down

with the "ip routing" activated

So there's a route created automatically for the vlan interfaces/subnet :

     10.0.0.0/24 is subnetted, 6 subnets

C       10.114.10.0 is directly connected, Vlan10

C       10.114.11.0 is directly connected, Vlan11

C       10.114.12.0 is directly connected, Vlan12

C       10.114.1.0 is directly connected, Vlan2

C       10.114.250.0 is directly connected, Vlan250

C       10.114.253.0 is directly connected, Vlan1

S*   0.0.0.0/0 [1/0] via 10.114.250.1

I'd like to create an interface vlan 254 with an ip address that would not appear in the routing table.

I don't want the subnet of vlan 254 to be routed by the c3750 stack.


The global routing table will contain all the routes.  If you want to have a separate routing table for your management only, then you need to create a VRF and put your management vlan in that VRF.  This  WS-C3750X-48T-S   way you have complete separations between global and VRF tables.

2014年2月17日星期一

3750 Poe problem

I have 4 WS-C3750V2-24PS-S   connected in stack.

Switch 01

WS-C3750G-48PS-S

Switch 02

WS-C3750-48PS-S

Switch 03

WS-C3750-48PS-S

Switch 04

WS-C3750-48PS-S

xx01#sh power inline

Module   Available     Used     Remaining

          (Watts)     (Watts)    (Watts)

1           370.0       29.0       341.0

2             n/a        n/a         n/a

3           370.0       29.4       340.6

4             n/a        n/a         n/a

but when I try to connect a Poe phone in modules 2 or 4 it doesn't work.

Any idea why the watts available says n/a?

xx01# sh env power all

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts

1  Fixed                                            Good

2  Fixed                                            Good

3  Fixed                                            Good

4  Fixed                                            Good

Regards and thanks

Ok, Herman.  Can you post the output to the following commands:

1.  sh switch WS-C3750X-24P-S   detail; and


2.  sh version