Case: improve resilency and throughput of network.

Customer have issues with LAN. Customer do not want to spend money on new switches/routeres. Bottleneck – connection between datacenter switches and distribution/access level switches.

Problems description: low througput. No redundancy for access switches 1 & 2 for cases, when link from access witch to distribution switch fail.

Proposed solution: increase througput between DC switches and distibution level switches. Increase througput between distribution switches and access level switches. Introduce redundancy.

Initial schematic (fragment of network).

Implemented solution schematic (fragment of solution).

Solution description: Impement port-channel connection between DC switch 1 and distribution switch1. Implement port-channel connection between Distribution switch 1 anc access switches 1 & 2. Connect access switches 1 & 2 with port-channnel. Configure spanning tree, to make sure Distr switch will be root bridge.

Configuration fragments.

DC switch 1:

interface Port-channel14
  description Port-Channel to Distr switch 1
 
interface Ethernet0/1
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/2
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/3
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/4
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active

Distr switch 1:

spanning-tree vlan 10-500 priority 28672

interface Port-channel14
  description Port-Channel to DC switch 1
 
interface Port-channel56
  description Port-Channel to DC switch 1

interface Port-channel78
  description Port-Channel to DC switch 1

interface Ethernet0/1
  description Link to DC switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/2
  description Link to DC switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/3
  description Link to DC switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active
interface Ethernet0/4
  description Link to DC switch 1
  switchport
  switchport mode trunk
  channel-group 14 mode active

interface Ethernet0/5
  description Link to acc switch 1
  switchport
  switchport mode trunk
  channel-group 56 mode active
interface Ethernet0/6
  description Link to acc switch 1
  switchport
  switchport mode trunk
  channel-group 56 mode active

interface Ethernet0/7
  description Link to acc switch 2
  switchport
  switchport mode trunk
  channel-group 78 mode active
interface Ethernet0/8
  description Link to acc switch 2
  switchport
  switchport mode trunk
  channel-group 78 mode active

Acc switch 1

interface Port-channel12
  description Port-Channel to Distr switch 1
 
interface Port-channel34
  description Port-Channel to acc switch 2


interface Ethernet0/1
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 12 mode active
interface Ethernet0/2
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 12 mode active

interface Ethernet0/3
  description Link to acc switch 2
  switchport
  switchport mode trunk
  channel-group 34 mode active
interface Ethernet0/4
  description Link to acc switch 2
  switchport
  switchport mode trunk
  channel-group 34 mode active

Acc switch 2

interface Port-channel12
  description Port-Channel to Distr switch 1
 
interface Port-channel34
  description Port-Channel to acc switch 1


interface Ethernet0/1
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 12 mode active
interface Ethernet0/2
  description Link to Distr switch 1
  switchport
  switchport mode trunk
  channel-group 12 mode active

interface Ethernet0/3
  description Link to acc switch 1
  switchport
  switchport mode trunk
  channel-group 34 mode active
interface Ethernet0/4
  description Link to acc switch 1
  switchport
  switchport mode trunk
  channel-group 34 mode active