Hot answers tagged

6

I understand that this is an incorrect configuration, but what was blocking traffic to the new switch? Is this part of the port channel or spanning tree or something else? Nothing was actually "blocking" the traffic to the new switch, the traffic was simply being forwarded to the wrong switch. This is normal operation of ports that are part of a LAG. The ...


4

As it turns out this cannot be configured in a sane manner. Both values are taken from the configuration of the DNS resolver and search-list for the management plane of the switch. This implies that you cannot set different values on different interfaces and you cannot set different values for your management network.


3

I don't think there is a way to copy config from Cisco to Aruba as both run on different OS.


3

There are many wireless companies, many of which I have no experience. That said, I personally have never seen or heard of any Pakedge or Luxel wireless deployments. There has been a lot of change in this industry and probably will continue to be. If someone were to ask me a list of vendors to consider, this would be my current list (in order): Aruba/HP ...


2

dear i faced same problem but with 3rd party AP not aruba .taking into consideration our handheld can be connected wired and wireless, after alot of analysis we found that those handhelds generate huge multicast (icmp , TCP and UDP) traffic cause even switch CPU% increase to unusual percentage. the only work around solving this case , isolate handheld ...


2

No. GNS3 is limited to Cisco devices due to being based on Dynamips.


2

There doesn't seem to be a simple command to reset an interface to default. If it's any help you can quickly display the current config by running show config interface n - saves you from searching for the somewhat scattered relevant lines in the config file.


2

One way to achieve this is to use a tagged VLAN for the phone traffic and a different untagged VLAN for the Mac/PC traffic. The phone is either manually configured with the VLAN tag for its traffic, or it can learn it through LLDP-MED. The phone passes the untagged traffic through to the Mac/PC untouched. If 10.1.10.0/24 is the Mac/PC network and 10.1.20....


2

Your network is becoming too thin too fast between the server and the clients. While the server can send well over 1 Gbit/s to each client switch, those switch uplinks are bottlenecks - more than 1 Gbit/s on a link results in dropped traffic. Your graph shows the bursts to carry too much volume to be buffered within the core switch. You should check the ...


2

You need to configure the 2530 for IGMP forwarding, otherwise it'll simply flood. For instance, vlan 1 ip igmp turns on IGMP forwarding for VLAN 1 and sets the switch querier to automatic mode. Additionally, you can use the vlan x ip igmp options to disable all but one switch as querier - there must be one querier for each cast - and to limit IGMP casts ...


2

A stack of 2 switches forms a single logical switch. So you first configure the stack, without considering the third one. You now have 2 switches (one stack and one standalone) Then you create a Ling Aggregation Group (LAG) between the stack and the third switch, with a link from each stack member to the standalone switch. Note: HP use the term "trunk&...


2

Have you noticed that rate limiting (at least on HPE/Aruba) is done in bursts, not smoothly? That may interfere with TCP congestion control which might not be able to adapt to the bandwidth limitation. That in turn might cause apparent "reordering" as a combination of the switch's dropping and TCP's retransmissions. Have you verified that the reordering ...


2

The Aruba 2530 are rebranded HPE (Provision), yes. I'm using the "ArubaOS-Switch Management and Configuration Guide for YA/YB.16.04" pp. 272 which should be fairly easy to find at HPE. You can configure up to four mirror "sessions". Basically, you assign an egress interfaces to a session mirror 1 - 4 port exit-port-# [name name-str] and then assign each ...


2

I am going to say no, running latest firmware on my 2920 (J9728A), the only stacking member options are as follows: J9729A J9727A J9728A J9726A


2

As the PC is not sending any IGMP joins you can't really benefit from IGMP snooping. IGMP snooping relies on listening to (snooping) passing IGMP packets. These packets contain information on which multicast groups the PC wants to join. The switch is then able to make a decision on which ports to send multicast traffic for the group to and which ones to ...


1

Based on your diagram, you cannot port channel. A port channel is between two devices. An port channel must start on one device, and terminate on another device. The port channel represents a single link between two devices that is actually comprised of multiple links. I don't think you really understand what a port channel does. It primarily fools spanning-...


1

By logic, port-level security makes active loop detection pretty much gratuitous. Loop detection is designed to detect and disable loops created by accident or maliciously - both are very hard (if not impossible) to accomplish with proper port-level security. However, I'd recommend leaving RSTP/MSTP enabled as it doesn't hurt and can save you one day. Just ...


1

You need to assign an IP address to the VLAN 100 SVI to be the gateway address. DHCP will automatically assign DHCP on an addressed interface from the correct pool based on the interface address. You also need to have the gateway address in the pool. You probably want to define a DNS server in the DHCP pool, too. ip dhcp pool guest-0100 network 10.10.100.0 ...


1

You can SHA1 encrypt the local password, e.g. password manager admin sha1 <hash> I have extensively used RSA authentication for SSH and SFTP access - imho the best option since there's no shared password. This is initially set up with aaa authentication ssh enable public-key You upload the public key ring to /ssh/mgr_keys and can check if the keys ...


1

It's poorly documented but Jesse's hit the nail on the head: The switch uses the IP default gateway only while operating as a Layer 2 device. While routing is enabled on the switch, the IP default gateway is not used. from https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c04725294 So, you'll need to add ip route 0.0.0.0 0.0.0.0 192.168.2.1


1

I understand your question as "How do I get untagged frames to go nowhere on trunk ports?" - your approach with a dummy native VLAN would work. However, as you point out, the dummy VLAN would be functional and could actually be used or cause problems. So, why don't you simply remove the untagged/native VLAN from those ports? (no vlan <VLID> untagged &...


1

trying to figure out how I can take the existing equipment and move it to the new vlans while keeping it all up and running. If you want to have the VLANs communicate with each other this isn't possible (edit: in a sane manner). You'll need to migrate the IP addresses of the nodes changing the VLAN and accordingly, the IP subnet. Migration needs to be done ...


1

As what jonathanjo said, you would have one subnet per VLAN. Without knowing the nature of the business you're in, I would recommend maybe two different subnets for servers? We have production and test servers, and they're both on different VLANs. The developers for our company are on a VLAN that is able to communicate with both the TEST and DEV VLANs, ...


1

There are two good reasons for using VLANs: To allow you to apply security policies (ACL) or QoS policies at a layer 3 boundary. To reduce the scope of LAN failures such as loops or broadcast storms. In your case, it would make sense to put your phones on a separate VLAN, so you can easily apply QoS policies. In all but a very few special cases, you ...


1

You pretty much have to have subnet per VLAN, as inter-VLAN traffic has to go through L3 routing, either at your switches or a router. Just curious: why do the VLANs have to communicate with each other?


1

Some Cisco switches allow you to disable the auto state function on an SVI, which would give you what you want, but I’m not aware of an equivalent feature on Aruba/Procurve switches. An alternative would be to add the VLAN as a tagged VLAN for one of the ports you know will always be up. Could I suggest as an alternative solution that you create a loopback ...


1

As Vlan 212 is network management Vlan, you should have it configured across your network and tagged on uplink (switch-switch links) ports, then it would be up and you could ping/reach it from other subnets. According to HP document IP Interfaces There is a one-to-one relationship between a VLAN and an IP network interface. Since the VLAN is ...


1

The way you connected the Controller is technically correct. By using DOT1Q VLAN tags you allow traffic within VLAN 1,2,3,4 to be sent from and to your Controller. Keep in mind that it might not be necessary to allow all VLANs on the port to the controller (e.g. UserLAN, DevLAN) because you might only need Guest and UserWIFI for WLAN. Only allowing certain ...


1

VLAN "Names" are locally significant to devices and different devices will allow different length strings to name them, so no need for them to match (although it helps when troubleshooting if they are at least similar). As long as your VLAN 1 is native on the Aruba port and matches the correct subnet on your firewall, this topology should work just fine. ...


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