Hot answers tagged

7

Yes you can uplink different brand of switches using SFP. The term stacking in this context means that several switches act as a single one. This is always a proprietary (and model dependent) feature, and can be done only with switches of the same brand (and not all of them). SFP doesn't work only with fiber: there SFP to copper converters, so you can ...


6

My questions are: Should we setup on our core network switch OSPF with a router ID of 1.1.1.1 and then not set any OSPF settings on any other switch? OSPF is not necessary for this implementation. Would PIM Sparse Mode only need to be enabled on the core switches or on all of the switches in the network? Pim-SM needs to be enabled on each L3 ...


6

is it possible to add support for an OID that is not there by default? Unfortunately, adding support for these OIDs would require each of your vendors (Brocade and Dell) to implement them in their software images.


5

The reason that this doesn't work is that your desktop isn't actually in vlan 200. You changed the IP address of the desktop to be on the 192.168.200.0/24 subnet but that's at layer 3. Looking at the layer 2 topology, your PC is connected to a dumb switch which is hooked into a vlan 1 port on the managed switch. Because of this, regardless of what your IP ...


5

Since you want to permit WAN traffic, matching only any, you need to have a permit any any at the end. Basically, you want to deny traffic in and out of the Wi-Fi VLAN. For each of the other VLANs you need a deny ip 10.0.240.0 0.0.0.255 <otherSubnet> <subnetWildcard> on the incoming interface or the VLAN of the wireless subnet and deny ip <...


4

In "Dell-speak," a permanent vlan means that the setting is saved to a file so that the VLAN is configured when the switch is booted up. Otherwise rebooting the switch would delete the vlan configuration. It's roughly the same as "copy run start" on a Cisco switch. And I agree with John -- the VLAN "types" are arbitrary and vendor-specific.


4

You can't do it on Sonicwall device. TZ series doesn't support link aggregation. Check this doc http://documents.software.dell.com/sonicos/6.2.3.1/release-notes/document-download?ParentProduct=847


4

Honestly, it's unthinkable for an Ethernet port not to have an individual MAC address. For a lot of reasons... LAN communication, port-channel, etc. But let's doubt it, in the world of machines everything is possible! You could check that, you have a bunch of show commands there: show interfaces detail {ethernet interface | port-channel port-channel-number},...


4

You can try to disable dot1x port-control on a specific interface under interface configuration mode using no form command of no dot1x port-control ...


4

The setup is totally valid, provided all devices support LACP LAG. Two things though: The network design is not very good, neither for reliability nor from the performance/efficiency perspective. Basically, don't chain but build a tree. If possible, connect the top three switches to the bottom one directly (or even the firewall), shortening forwarding paths,...


4

On most devices, that is possible. Check the manual for splitting a QSFP28 port into four SFP28 or SFP+ interfaces. The datasheet specifically shows 28 10GbT and 8 SFP+ for 10G and lists a 40GbE, 4x10GbE, QSFP+ to 4xSFP+, passive DAC. According to the user guide, using feature auto-breakout should automatically detect a breakout cable and use split ports: ...


3

The Dell 6248P is actually a Layer 3 switch, which means it can also act as a router. If you are simply using it as a Layer 2 switch, you should be able to just ignore those settings.


3

There's no default gw defined by default on Powerconnect 5500 series switches. Use no ip default-gateway command to remove or ip default-gateway <gw address> to change. The CLI manual is here. Sounds like it would be a good thing to read up on.


3

@edit: SOLVED!!! Just missed the port numbers, CAN'T BELIEVE IT! The Cisco and Dell port order numbers are different . But well, this conf I just posted works as a charm, now I have all devices connected! Thanks anyway :D


3

The Cisco WS-C2960S-48-FPS-L has 4 SFP ports which operate at 1Gbps. From the documentation I can find on the Broadcom 57840S, it has four SFP+ ports that operate at 10Gbps. I find no mention that it can support lower data rates. As for your Cisco Twinax cables, the only ones I am aware of are 10G. These will not work in your 2960S. A couple of posts ...


3

SFP+ = 10gig SFP = 1gig Most SFP+ ports will accept an SFP transceiver SFP ports cannot support SFP+ transceivers You might be able to connect a 1gig link from the Broadcom to your switch (if the Broadcom supports SFP, which I couldn't find), but you cannot connect a 10gig link to your switch since your four transceiver ports are all SFP, not SFP+.


3

When testing networking connections, don't use windows machines. My firewall was set to allow ICMP traffic from any subnet on any domain profile yet it was still blocking the packets. Turning the firewall off completely allowed the traffic through, so the routing is working. Also, pings probably aren't the best way to test network connectivity. For ...


3

RSTP is mapped to PVST+ VLAN 1 instance, so make sure you have VLAN 1 enabled on any trunks between the RSTP and PVST+ regions for the two to interoperate. Also, if you have PVST+ regions separated by an RSTP region, the PVST+ BPDUs are transparently forwarded across the RSTP region (so long as the VLANs are trunked), so the RSTP region acts like a shared ...


3

It depends on your device, if temperature is high, fans will spin faster and you reduce timelife of your switch. I think 63°C is slightly high but I have switches working at this temperature (or greater) with no problems. If you need a number, according N4000 manual, front led is triggered when "The thermal sensor’s system temperature threshold of 75°C has ...


3

The answer was to use dot1x port-control mac-based on each port that you want authenticated.


3

(converted from comments) The "Total Power" figure should show what the PSU can deliver, regardless of what's currently in use. The "0 W" pretty clearly shows there's something wrong. Possibly, the internal PoE PSU has died or is disconnected/removed. Also, there may be an external PoE PSU connected that isn't powered or has died.


3

Since your clients are connected by the edge switches you'll need to filter unwanted traffic there - before the core switches. How exactly that can be done depends on the models/series you use. With current models (2530 or so) you could apply an ACL to the VLAN to stop inter-VLAN communication. E.g. for 192.168.3.0/24 in VLAN 3: ip access-list extended ...


3

According to your requirement create sub-interface for first 3 vlans in router and do inter-Vlan configuration in router and further connect L2 switch connecting router and L2 switch The link connected between router and switch should be trunk link allowing all vlan from router to switch . Post configuring inter -Vlan routing .By default all Vlans will ...


2

I found this information on a Dell support forum: If a packet arrives at the port from an end device carrying no VLAN tag, then the switch will add a VLAN tage which corresponds to the PVID, and then forward it within that VLAN; so the PVID mechanisim allows you to have traffic originating from a non-VLAN aware device to become an 802.1q packet, so that it ...


2

Sean, your setup seems correct if you're making it from one VLAN to the next; which you can see when you traceroute from one switch IP to the next. If you aren't very familiar with networking, try making your life easier by simplifying your setup. Give this setup a go: PC1 Switchport - Gig1/0/10 IP Address - 10.1.10.100/24 VLAN - 10 PC2 Switchport - Gig1/...


2

Went trough the Dell documents and it doesn't explicitly say anything either way about stacking different platforms together. However the complete lack of documentation regarding stacking different devices together sends a pretty clear message that they are only intended to stack with devices of the same model/line. More generally, most stacking solutions ...


2

This is not possible using the Firewall model specified in the question. The final solution was to get more space to add a switch behind the firewall.


2

You're (192.168.0.164 ) directly connected to the switch (10.168.0.106) you're SSH'in into and you get dup ACK and retransmit... There is something not right , seems that the Network Gremlins are hungry. What does the switches error counters say? Also note that some devices puts traffic to/from the control plane at a lower priority than the data plane. ...


2

Solution: The commands on VLANs on the access switches for VLAN association with subnet are the root cause of the issue. vlan associate subnet 192.168.48.0 255.255.255.0 This command tells the switch to associate traffic with the appropriate VLAN by source-IP address in packet headers. What was happening is that the return traffic from a client would ...


2

Mode general and trunk are both used for VLAN trunking mode general You may choose multiple tagged and untagged vlans, default is tagged mode trunk You may define one native vlan, all others are tagged mode access You may define a single untagged VLAN Could you post your configuration for further troubleshooting? If you set the interface to mode access ...


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