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PowerConnect OpenSSH Version Vulnerability

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We have Dell PowerConnect 6224 switches that are running the latest firmware however our security scans show version 4.3 of OpenSSH being used on those devices.  Security shows two vulnerabilities listed below and wants to know if Dell intends to update the version of OpenSSH running on those switches or if Dell's implementation is vulnerable to these CVE findings.  Please let me know.

CVE-2008-5161:

The version of OpenSSH running on the remote host has an information
disclosure vulnerability. A design flaw in the SSH specification
could allow a man-in-the-middle attacker to recover up to 32 bits of
plaintext from an SSH-protected connection in the standard
configuration. An attacker could exploit this to gain access to
sensitive information.

CVE-2011-4327:

According to its banner, the version of OpenSSH running on the remote
host is earlier than 5.8p2. Such versions may be affected by a local
information disclosure vulnerability that could allow the contents of
the host's private key to be accessible by locally tracing the
execution of the ssh-keysign utility. Having the host's private key
may allow the impersonation of the host. 

Note that installations are only vulnerable if ssh-rand-helper was
enabled during the build process, which is not the case for *BSD, OS
X, Cygwin and Linux.


Ram memory normal usage on N2048 and N4032

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I have a doubt regarding the ram usage on N2048 and N4032. The N2048 has a 1GB Ram memory but the usage seems to be pretty high  ( nearly to 1GB). Under standard conditions what is the average usage of this model? 

This is the current code : Dell Networking N2048, 6.2.0.5, Linux 3.6.5-1289​203e 

We want to discard a memory leak on switches running this code.

Thank you.

Luis.

Create VLAN on Powerconnect 2848

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I have  a Powerconnect 2848 and i want to create vlans. So i'm starting as simple as possible:

I have set port1 on default PVID 1 and port 2 on PVID 2

In VLAN membership:

VLAN ID 1                      VLAN ID 2

1      2                              1         2

U     B                              T         U

I don't have communication between computers on port 1 & 2. What i'm doing wrong?

Do i have to enter VLANID on network card on the computers?

Thanks in advance

Temperature State Change Alarm OID

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Hi all,

I'm trying to set up monitoring of some N4000 series open manage switches on PRTG and I think I have found the OID's I need but..... The value for the OID's I have found include this :

Temperature state change alarm: Unit number1 current, normal, previous, warning 

This is not ideal as I think it refers to the threshold value of 75 degrees C and i would prefer an alarm to generate at 55 degrees.  I've read a few other posts related to this but the OID values given do not work for my switches.

Greatly appreciate any thoughts!

Stacking N1500 series switches

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Hello everyone

I am trying to make 4 switches form a stack but with no luck so far.  I believe I follow the steps correctly but I really don't know why the rest of them do not add themselves to the stack. If anyone has some spare time, please have a look at the steps I take below:

1. The cables I use are SFP 10G. The ports I want to use are 1/0/3 and 1/0/4. I can confirm that the cables are plugged in correctly to form a ring topology.

2. Power on switch 1 (the one I want it to be the master) and access the switch using hyperterminal.

3. After a minute or two I power on the next switch and then the rest of them.

3. go into 'operational mode' and start the 'setup wizard'. I then create an admin account, and setup vlan1. I enter the IP, subnet and GW

4. Then I follow the steps shown in this link: http://www.dell.com/Support/Article/us/en/19/HOW10800

5. After I run 'reload', I reboot  all the switches but they all become unit 1.

I don't know what I am doing wrong here. Any suggestions please?

N2848 - MAC Access Control Lists

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Hi,

Our network uses several Dell 2848 switches and we would like to restrict network access to a certain group of MAC addresses.

Has anyone any experience of this?  From the menu I do see this option 'Home > Switching > Network Security > Access Control Lists > MAC Access Control Lists'.  I can't find any explanation of this function in the PDF manuals I downloaded so wasn't sure if I was in the right place.

Any help would be greatly appreciated.

controlling inter vlan routing

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hello i am using a stack of 2 dell n3048 network switches as my default gateway. 

vlan 1 data 

vlan 10 - ***

vlan 30 video 

currently they can all communicate with each other . is there any way to control which of these vlans can access the other?

example : data vlan cant access video vlan

is there any access list on these switches or would i have to route the traffic thru my firewall ?

Dell power Connect 2848 set port speed

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Hello, I have a Dell power Connect 2848 need to set ports to 1000 gigabit only not Auto sensing ?


Open Manage Network Manager Top Interface Bandwidth

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I have a 1GB link between 2 sites. On one side the link goes into a Force 10 (10GB port) and the other side goes into a 4032f 10GB port. The speed displays as 1GB in Open Manage which is correct.

My question is on the Top Interface Bandwidth within Dell OpenManage Network Manager, lets say it shows as 10% for this port (either side). Is that 10% of 10GB or 10% of 1GB. Obviously if it was 10% of 10GB, the link would be at maximum. My true figures are circa 6-7% daily. 

M6348 Firmware password

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Hello, I upgraded the firmware on my M6348 switch following the "Upgrading PowerConnect Switches from Version 2.x.x.x or 3.x.x.x or 4.x.x.x or 5.x.x.x to 5.1.10.1 Firmware" guide. However after it rebooted I am no longer able to log into the switch with any combination of username and passwords. I attempted to log in via telnet and that did not work either. I followed the directions exactly.

I am hoping to avoid needing to log into the console as I am 700 miles away from the switch.

Please advise.

Thanks!

Force10 to Cisco

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Not sure how much Force10 is talked about here but I figured i'd give this a shot.

I have a couple Force10 4810P switches I want to connect to a set of stacked Cisco 3750s. I'm a complete novice on the Force10's so configuring them properly is proving to be troublesome.  Does anyone here have any advice to set up a trunk between them?  No matter the configuration to get there, I just need to understand the basics of connecting them.  Thanks.  

PowerConnect 2848 set Qos for Voip vlan

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Hi, have a PowerConnect 2848 and have set up a vlan for my phones. not sure how to set the QoS for the phones vlan.

Dell N2000 series stacking

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Hi,

I have unit 4 units n2048p stacking together as shown, can I force switch 1 become permanent master/management unit? Currently I only can renumber the unit ID. Firmware ver. 6.3.1.8

Additional question:

1.) I have 1 voice vlan and 1 data vlan, how do I enable LLDP on this? 

2.) How should I configure QoS for voice vlan?

VLANs can't see internet

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Hello All,  I am new to VLANs and trying to learn on my own.   I have got a Powerconnect 6224.  I setup two vlans and connected two machines to each VLAN.  the machines in each VLAN can see each other and they can see the other VLAN members.  But,  none of them can see the internet... internet port is #2  what am I missing?

VLAN 10 interface = 10.10.0.1/24  members of vlan 10 = ports 17-21

VLAN 20 interface = 10.20.0.1/24  members of vlan 20 = ports 13-16

routes to each network

10.10.0.0 -> 10.10.0.2

10.20.0.0 -> 10.20.0.2

Here is the running config on the switch.  can you see what I missed?

*******************

console>enable

console#show running-config
!Current Configuration:
!System Description "Dell 24 Port Gigabit Ethernet, 2.0.0.12, VxWorks5.5.1"
!System Software Version 2.0.0.12
!
configure
vlan database
vlan 10,20,99
exit
stack
member 1 1
exit
ip address 192.168.1.3 255.255.255.0
ip default-gateway 192.168.1.1
ip routing
ip route 10.10.0.0 255.255.255.0 192.168.1.3
ip route 10.20.0.0 255.255.255.0 192.168.1.3
interface vlan 10
routing
ip address 10.10.0.1 255.255.255.0
ip netdirbcast
exit


interface vlan 20
routing
ip address 10.20.0.1 255.255.255.0
ip netdirbcast
exit
interface vlan 99
name "WAN"
dot1x auth-not-req
routing
ip netdirbcast
ip local-proxy-arp
exit
username "admin" password 4f87869237d36d241ed31f8fe95ad8d6 level 15 encrypted
!
interface ethernet 1/g1
switchport mode general
no switchport general acceptable-frame-type tagged-only
exit
!
interface ethernet 1/g2
switchport mode general


no switchport general acceptable-frame-type tagged-only
exit
!
interface ethernet 1/g12
switchport access vlan 20
exit
!
interface ethernet 1/g13
switchport access vlan 20
exit
!
interface ethernet 1/g14
switchport access vlan 20
exit
!
interface ethernet 1/g15
switchport access vlan 20
exit
!
interface ethernet 1/g16
switchport access vlan 10


exit
!
interface ethernet 1/g17
switchport access vlan 10
exit
!
interface ethernet 1/g18
switchport access vlan 10
exit
!
interface ethernet 1/g19
switchport access vlan 10
exit
!
interface ethernet 1/g20
switchport access vlan 10
exit
exit

console#

Oversized package

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HI Guys,

i am facing an issue with a switch dell N1548, we have a separate network just for surveillance cameras and all our 160 ip cameras are distribuited in 7 switches of the the same model, all the Switchs trunk port are showing me oversized packed and some of them are dropping package, i checked each port connected the cameras and not seeing any problem, it seems the problem is when the pachage arrives at the trunk port and charge the MTU size of the pachage them the problem starts, any ideia what may causing this mtu change ?  

ps. please check the attach to check the error.

bes regards,


Copying configuration via SFTP on N-Series 3048P or 4032F

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Testing (firmware 6.3.1.8)

copy startup-config suser@host/.../filename

executes but always ends with

File transfer failed!

But a check of destination host shows the file always transfers (I assume in its entirety).  Cosmetic bug or something deeper?

X4012 - showing two default gateways?

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OK, I have a pair of X4012 switches installed in a remote location. When I had configured them, I had originally set the default-gateway to an atypical value because I thought I was going to be sharing a /24 network. That didn't happen, so now, I would like to correct the gateway settings, but when I tried to overwrite the old gateway setting in the CLI, it actually added a second gateway.

How do you remove a default-gateway from these things? The GUI is useless for changing the gateway, but I don't mind CLI access. I just don't see how to do this...

40 port card throughput on E600 ExaScale chassis

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Hi,

Anyone using 40 port 10G cards (LC-EJ-10G-40S) with the E600i ExaScale platform ? What's the per port throughput on these cards ? Per docs each slot should have 100G of capacity but how does this map to individual port(s) on the linecard itself ? I have some 10G servers connected and seems that some (not all) ports get capped somewhere around 2.5 G while other seem to go up to 6...7G range. Are the ports grouped somehow and the bandwidth pre-allocated to a port group ? The old TeraScale had a port-pipe limit where a group of ports was mapped to the specific port-pipe and the total bandwidth was limited by the port-pipe throughput.  

Dell Enterprise Hardware & Software Updates, November 7-11

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Open Manage Network Manager

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I am using this software for switch management. For the past year, all I have got out of it is backing up the configs of all my switches. I knew that other cool stuff could be done with it and there is not much documentation out there.

Anyway somehow I am now getting somewhere with it. I have turned on sflow on some of my switches and now I am able to produce things like 'Top Talkers', 'Top Interface Bandwidth' etc but to be honest, I am not quite sure how I achieved this.

I would like to put a few questions out and hopefully get a better understanding.

Q1

Traffic Analyzer/Register - What does this do. I have ran it on 4 switches and it now says I don't have any licesnes to register anymore. What exactly does this do?

Q2

When looking at Traffic Flow/Top Conversations Reported Sample Value will show 5MB but if I change this to estimate Actual Value, it shows 5GB. I know 5GB is right because I transferred circa that mount. What is all that about?

Q3

After having no data to display at all for the past year, then setting up sflow on a few switches, why can I now all of a sudden see interface stats for switches I haven't setup flow on?

cheers

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