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dell vlt vs cisco vpc

By October 27, 2020No Comments

Eth1/3    Desg FWD 2    128.131  P2p, In the first test, Cisco switches act as the root bridge for the respective VLANs, Create two tagged streams, where VLAN ID 10 is sourced from port 1 with MAC address. 1 GbE switches like the Dell S50N and Dell S60 do not support VLT, so, in these cases, stacking can still be employed. From the S4128F perspective, 1/1/18 and 1/1/19 interfaces form the discovery interfaces/VLTi (Po-1000) on the VLT Peer1(S4128-SW1). This allows for an non-blocking, multipathing scenario. – port-channel-protocol lacp Figure 17: Physical and logical network topology -Dell EMC RSTP and Cisco RPVST+. The figure below shows how the traffic flow is sent from port 1, to port 3 and to port 4. port-channel100 128.2517 128 500 FWD 1 32769 0023.04ee.be01 144.99 Po100 Desg FWD 1 128.4195 (vPC) P2p – interface Ethernet1/13 – wr, – enable Cisco_Nexus_5548UP_1 - 'show vpc brief' output, Cisco_Nexus_5548UP_2 - 'show vpc brief' output, Cisco_Nexus_5548UP_1 - 'show vpc statistics vpc 10' output, Cisco_Nexus_5548UP_2 - 'show vpc statistics vpc 10' output, Cisco_Nexus_5548UP_3 - 'show interface port-channel 10' output. Obtain required vPCs, IDs, and the VLANs required for each vPC. You can read more about Dell’s VLT technology and its advantages on my prior blog, Dell Force10 – Layer 2 Multipathing via Virtual Link Trunking (VLT) In this blog, I will configure Cisco vPC between two Cisco Nexus 5548UP switches [NX-OS 5.1(3)N2(1)] down to a third ToR Cisco Nexus 5548UP switch [NX-OS 5.1(3)N2(1)]. – vpc 10 – int tengigabitethernet 0/47 Prior to supporting standardized IEEE 802.1Q tagging, 3Com used proprietary Virtual LAN Trunking (VLT). Layer 2 multipath support is implemented by several vendors each having their own proprietary solution. Force10_S4810_2, – enable Recover both ports, check for traffic disruption, and ensure that N5K1 becomes the root bridge. – switchport mode trunk Nice explanation but I don’t agree with the following point, “For redundanacy purposes, many users would implement stacking and then run spanning tree protocol (STP) to block redundant links.”. – exit It just involves creating a VLAN and putting the respective interfaces in the VLAN. Your best bet is to contact Dell TAC support (1-866-203-6875) for Force10 products. In the past I have seen engineers stack at the access layer and then go up to two separate upstream L2 switches and employ STP to block redundant paths which is not a recommended solution. As far as each side was concerned they were in a port channel with a single switch running LACP – no shutdown – peer-link port-channel 100 – exit Root ID Priority 24586 The respective configuration is shown below. The VLAN membership is shown in the following figure: From the Cisco N5K perspective, by shutting down Po100 locally, Po110 continues to forward the traffic since both port channels are continuously forwarding. – no shut Force10_S4810_1, – interface tengigabitethernet 0/2 On all S4810 switches I change the ‘reload-type’ to ‘normal’ mode since I don’t want to use the default bare metal provisioning (BMP). I have checked Cisco Website and I am assuming that one of the Cisco Catalyst 9200 or 9200L will be a good fit , what is your suggestions . To check for traffic disruptions, shut down port 30 and port 1. Spanning tree enabled protocol rstp with force-version rstp VLAN0001 – exit – no disable Po100 Desg FWD 1 128.4195 (vPC) P2p As for as connecting the Cisco to Dell and other vendors, you can use LACP for bundling multiple uplinks in one logical connection. lets say I need one at 1500 mtu and the second at 9000? – wr. – exit Just configure the MTU in your network path(s) to the largest frame size you expect if you desire no fragmentation. – wr Verify that the data flow from Port 1 to Port 3 and Port 4 flows through the vPC port-channel to N5K2, and down through each respective link. The only switch configuration I don’t show in this lab is for the Dell Force10 S50N (S50N_1) simply because I am using it only for the management network and the configuration is very basic. Po1 Root FWD 1 128.4096 (vPC peer-link) Network P2p I confirm that the vPC is correctly configured and functional with the below commands. Verify the appropriate member Ethernet ports are physically cabled. Configure a vPC Use any available Ethernet port to form a Cisco vPC enabled port channel on Cisco Nexus switches. A. VxBlock Systems. Po110 Desg FWD 1 128.4205 (vPC) P2p Configure the spanning tree mode on the port channels appropriately. You can see the Cisco vPC is used from the two core Nexus 5548UP switches down to the ToR Cisco 5548UP switch. – exit, B. The goal of VLT is to let you establish one aggregated link to two physical network switches in a loop-free topology. Where There are also open standards such as Transparent Interconnection of Lots of Links (TRILL) and Shortest Path Bridging (SPB) that as of yet have not seen wide spread adoption in the industry. – exit Verify the Ethernet ports that are designated to become members of this port channel. It does the same things as Cisco's Virtual Port Channel (VPC) and IEEE 802.1AX-2008 multi-chassis LAG (MLAG). In this lab, I will focus on Dell Force10’s VLT technology. Now I replace the ‘Cisco_Nexus_5548UP_3’ ToR switch with a Dell S4810 and confirm all is still functional. Are you sure you want to delete this comment? Shut down port 30 and port 1 on N5K1 and measure for traffic loss. – unit-id 0 Setup management ports and RSTP on the core peer switches – exit [5] 3Com VLT supported VLAN IDs 1–16 with 15 being reserved for Autoselect VLAN Mode (where a VLAN server decides port membership) and 16 reserved for Spanning Tree Protocol. – exit Po110 Desg FWD 1 128.4205 (vPC)P2p Will adding portmode hybrid and switchport work with the VLT Connection like this? – back-up destination 20.0.0.2 When vPC and VLT are configured on the Cisco and Dell EMC switches respectively, a 4-member port-channel link is created between the switches. – peer-link port-channel 100 FTOS = 9.1.0.0 – exit, * Also enable RSTP on Access Switch: VxBlock Systems. – conf With VLT, you can create a LAG for a server, switch, or any device that supports LACP to two different upstream switches. About this task Configure the spanning tree mode on the port channels appropriately. Interface Role Sts Cost Prio.Nbr Type Below is the network diagram for this lab. A major complication of existing link aggregation or bonding technologies is that all members interfaces of such a team/group need to terminate on one single logical switch. To make it possible to connect a LAG to different physical switches is to combine more than one physical switch into one logical switch using switch stacking techniques where the different physical boxes are seen as one logical switch for management and (spanning-tree) topology. – ip address 10.11.129.239/20 Two main reasons for this is that stacking provides a single control plane mechanism that is managed by the master switch; there is no hitless failover. Shut down port-channel 100 and 110 on N5K1 to simulate a fail-over scenario and to check for traffic disruption. – exit I am not clear on why you want vPC/ MEC...are you planning on deploying a large core switch at each remote site?? Cisco vPC with Dell S4810 at ToR. XenServer, Hyper-V, and ESXi – Architecture, API, and Coding, Transparent Interconnection of Lots of Links. The information that is provided in this section allows you to test the Cisco Nexus as the root bridge for the VLANs. portmode hybrid I am confused about the upgrade when the boot loader and the boot flash need to be upgraded as well. Interface Designated Bridge ID Priority 32768, Address 6400.6af6.faf4 The current local infrastructure in each site is considered as a simple infrastructure , few switches , router & firewall and for sure the MPLS Router" Switch " . – exit Shut down port-channel 100 and port-channel 110 on N5K1 to simulate a fail-over scenario and check for any traffic disruptions. Forgot Password? – port-channel 10 mode active we are upgrading the whole infrastructure in the main site " The Hub Site " , we are implementing an HCI Solution " it is not HyperFlex :( " . This allows for an non-blocking, multipathing scenario. – channel-group 10 mode active Interface – copy running-config startup-config, – conf I am looking for a suggestion and if you could confirm few points that I am going to mention. The results for both tests were identical. The “portmode hybrid” command should display under the interface in the ‘running-config’. IPv6 addresses are supported on Search . – wr – exit Spanning tree enabled protocol rstp Again, VLT allows a single device to use a LAG across two upstream devices while providing a loop-free topology using all available uplink bandwidth. Further, it looks like port TenGigabitEthernet 0/60 has been set to a stacking port making it unusable for anything else. – vpc domain 1 – no shut You do not have permission to remove this product association. Currently this works fine and having no issues. Root ID Priority 24577, Address 547f.eeac.13c1 – interface port-channel 1 Both rapid spanning tree protocol (RSTP) and rapid per-VLAN spanning tree (RPVST+) modes of spanning tree protocol is supported in VLT mode. The end device is where the MTU is set. vlt-peer-lag port-channel 10, Your email address will not be published. – conf Although VLT is a proprietary protocol from Dell Networking (formerly Force10) other vendors offer similar features to allow users to set up an aggregated link towards two (logical) different switches, where a standard aggregated link can only terminate on a single logical switch (thus either a single physical switch or on different members in a stacked switch setup) like Cisco vpc or MLAG. Also added why VLT is preferred over stacking due to its dual control plane mechanism and hitless nature. The ToR switches are usually stacked and VLT is then used upstream to the aggregate and core switches. User login. – copy running-config startup-config, – conf – bridge-priority 8192 This bridge is the root, Interface Role Sts Cost Prio.Nbr Type VSS is the 6500 technology to logically combine two physically separate chassis. Also, I am confused about the order of reloading, if I need to upgrade the boot flash/selector, then reload, or I just upgrade the image, the boot flash/selector all on B: and then reload. – switchport mode trunk However, if the ToR switch supports VLT such as the S4810 does, VLT can also be used from the switch down to the server. Sign up to try out various use cases with the Cisco SD-WAN Cloud ... Catalyst 8500 Series - Deep Dive- Community Live Event. Po1 Root FWD 1 128.4096 (vPC peerlink) Network P2p – interface Ethernet1/13 – port-channel-protocol lacp When vPC and VLT are configured on the Cisco and Dell EMC switches respectively, a 4-member port-channel link is created between the switches. I check and I saw that VSS is kind of similar to VPC in Catalyst . – exit If I reboot the S4810, the vPC peers report as down, and then go back up after the 4810 comes back up. Force10_S4810_1, – vlt domain 100 – exit, – vlt domain 100 – switchport mode trunk Interface Role Sts Cost Prio.Nbr Type ethernet1/1/3 128.524 128 2000 FWD 502 32768 6400.6af6.faf4 128.524 …. – spanning-tree port type network Login Login . For example, Dell Force10 uses Virtual Link Trunking (VLT), Cisco uses Multichassis EtherChannel (MEC) and Virtual Port Channel (vPC), Brocade uses Multi-Chassis Trunking (MCT) and Virtual Link Aggregation Group (vLAG), and Juniper uses Virtual Chassis technology. From the perspective of the access layer device, VLT presents as a single logical layer 2 domain that has a virtual link trunk terminating on separate switches in the VLT domain.

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