SG300 series and CDP

Hi,
I noticed that the SG300 series of switches do not support CDP. However, will these switches pass CDP packets onto an upstream device?
Thanks

Hi canadianicon25,
As David has pointed out, there should be a firmware release that will enable CDP on the SG300 series in the very near future, however, you can still use the SG300 series switches with a UC320W. Please follow the setup guide found on the following link to setup your SG300 switch for use in UC320W environment. Partner login is required to view the document.
http://tools.cisco.com/s2slv2/ViewDocument?docName=EXT-AS-370390
Cheers,
Julio

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CDP between SG300-24 and WS-X2948 WS-X2948G-GE-TX

Hello everybody,
I connected a SMB SG300 series switch to an 2948G (CatOS). On the first view CDP seemed not to work at all between the two. After configuring both switches to CDP version 1, the SG300 recognizes the 2948G in "sh cdp neigh", but not vice versa:
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core-switch> (enable) sh cdp
CDP : enabled
Message Interval : 60
Hold Time : 180
Version : V1
Device Id Format : Other
core-switch> (enable) sh cdp neighbors
No entry found.
on SG300:
wg-sw-3og#show cdp
Global CDP information:
CDP is globally enabled
CDP log duplex mismatch is globally enabled
CDP log voice VLAN mismatch is globally enabled
CDP log native VLAN mismatch is globally enabled
Mandatory TLVs validation is disabled
Sending CDPv2 advertisements is disabled
Sending Appliance TLV is enabled
Device ID format is Host Name
Sending CDP packets every 60 seconds
Sending a holdtime value of 180 seconds
CDP packets handling mode is bridging
wg-sw-3og#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - VoIP Phone
M - Remotely-Managed Device, C - CAST Phone Port,
W - Two-Port MAC Relay
Device ID Local Adv Time To Capability Platform Port ID
Interface Ver. Live
JAE0919BUZU(core-s gi28 1 146 T S WS-C2948G-GE 2/48
witch)
I checked a similiar setup of an SG300 against an Catalyst3550 in the lab. this worked flawlessly.
Any suggestions?
thx, Carsten

Yuriy,
In addition to these commands, you should review the MPLS Label (Outer Label) assigned by the MPLS network to the Xconnect to determine if it is using LDP or if is using a TE-Tunnel, MLS CEF (on the 7600) and the output of debug commands for the xconnect.
Note: Depending on the amount of Xconnects in your network, it's recommended to perform conditional debugging to limit the amount of debug data (i.e. debug interface Te4/4, followed by specific debug commands).
On the 7600:
- show mpls forwarding table | i 16002
- show mls cef mpls labels 16002
- show mls cef adjacency entry 16002 detail
- debug interface Te4/4
- debug mpls l2transport vc status event
- debug mpls l2transport vc status fm
Additional details available at :
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap6.html
http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.0/troubleshooting/guide/tr40l2v.html
Let us know if you'd prefer to continue troubleshooting with you.

SG300 series duplicate IP on VLAN

I know this question has been asked a few times before, and I've looked through all of those discussions on the board. None of those have been answered successfully, and I hope that maybe I can describe the problem in a way that will help someone here to find out what I'm missing.
I'm configuring a stack of switches to deploy in a new A/V/L network and I'm running into a duplicate IP error that's showing up ONLY on my SG300 series switches. Here's the setup I'm configuring:
- We have one 3750 Catalyst switch that is at the core of the network
- There are three 2960 switches at the distribution level
- There are nine SG300 small business switches at the access level
GENERAL SETUP STEPS
- IP routing is enabled on the 3750
- I've configured trunk ports to connect all switches together, but I have not activated any access ports
- I created management vlan 255 on all switches
- The management IP scheme I'm trying to use is this:
10.201.255.1/24 = Vlan 255 on the 3750
10.201.255.2/24 = Vlan 255 on 2960 switch
10.201.255.3/24 = Vlan 255 on 2960 switch
10.201.255.4/24 = Vlan 255 on 2960 switch
10.201.255.5/24 = Vlan 255 on SG300 switch
10.201.255.6/24 = Vlan 255 on SG300 switch
10.201.255.7/24 = Vlan 255 on SG300 switch
10.201.255.8/24 = Vlan 255 on SG300 switch
10.201.255.9/24 = Vlan 255 on SG300 switch
10.201.255.10/24 = Vlan 255 on SG300 switch
10.201.255.11/24 = Vlan 255 on SG300 switch
10.201.255.12/24 = Vlan 255 on SG300 switch
10.201.255.13/24 = Vlan 255 on SG300 switch
THE ISSUE
While I'm logged into ANY of the SG300 switches I see an error. This error does not happen with the 2960 or the 3750 switches. Here is the error:
%IPADTBL-N-IPDUPLICATE: Duplicate IP address 10.201.255.5 from MAC 88:5a:92:09:ab:98 was detected on VLAN 255, port gi18, aggregated (6)
The ip address changes and matches the ip of whatever SG300 switch I'm working on. The MAC address (88:5a:92:09:ab:98) is the MAC address of the trunk port on the 3750 at the core. When I unplug the trunk port on the 3750, I stop getting the error on all of the SG300 switches. I have not programmed any other ip address on the 3750 other than 10.201.255.1 255.255.255.0.
WHAT I'VE TRIED TO DO TO FIX IT
- Remove the ip address from Vlan 1 on an SG300 switch using
#int vlan 1
#no ip address
Once I did that, I can no longer reach the switch using the IP address assigned to vlan 255.
- Assigning Vlan 1 as the default vlan using:
#vlan database
#vlan 1
#default-vlan vlan 1
**then performed a restart of the switch
Here's the output of #show ip interface from one of the SG300 switches:
CR-FOH-PRONET#show ip int
Gateway IP Address Activity status Type
IP Address I/F Type Status
10.201.255.8/24 vlan 255 Static Valid
duplicated
I realize the easy answer is, "Well, you've got a duplicate IP address". Please know that I only put in the ip address for each of the SG300 switches only once. I did not put them on the 3750 switch (which is stated as the source of the conflict in the error). I think it's interesting that the 2960 switches are not displaying an error.
What are your thoughts? What am I missing?
Thank you for your help! I can post anything you need to help figure out what's going on.

Understand. perhaps the duplicate IP issue appears because you are using trunk ports between the 2960 Distribution and 3750 Core via mismatching native vlans.
Trunk ports uses vlan 1 as the native vlan by default, but you can change the behavior using the command:
switchport trunk native vlan 255.
That way you keep vlan 255 as the management and native vlan for trunks and it prevents any mismatch or any issues that you observed when you removed the IP from Vlan 1 or when you tried diabling Vlan 1.
Ideally if I look at your diagram, you should do this:
1) Run only Layer 3 Routing on the 3750 using for example EIGRP or OSPF (it then becomes a real core layer - the Core layer normally only runs routing and not Vlans or Spanning-tree.
2) Change the links between the 3750 and the 2960 to be Layer 3 routed interfaces instead of trunks, you can use point to point links subnet in each port going from the 3750 to the 2960
3) Enable EIGRP or OSPF between the 2960 and 3750 so that they can exchange all the Vlan informations or Subnet information via routing protocols
4) Run your Layer 3 Vlans on the 2960s (that makes them Distribution layer for Vlans) trunk those vlans to your access Layer so that you can assign them to the various hosts or PCs connected to the Access switches, the SG300.

Re:Can't able to access shared folders from different VLANs in SG300 series switches

Hi All,
I supplied 3 numbers of SG300 series switches for the sole reason to have inter-vlan routing. I created 4 VLANs in the switches and made one switch as Layer 3 switch and other 2 as Layer 2 switch. Inter-Vlan routing is working fine. I am able to ping PCs from different VLANs. But I am not to access shared folders. Customer has installed Window 2003 server installed and it is in VLAN 1. There are some folders created in this server and it is very important for users to have access to the folders.Also, I am not able to access shared folders in other VLANs. I have created a case with Cisco small business and I got a reply saying that the switches will not support shared folder feature, which I think is not real. I am getting a very time to implement this solution in the network. I have a Sonicwall firewall after Core switch which is connected to ISP.
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Prashant K

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