Difference between POE, POE+ and UPOE

Below is the quick summary of the differences between POE,POE+ and UPOE.

POE is the oldest standard for the devices which can be powered on from the switch. POE enabled switches can only provide upto 15W to the connected devices like phones.

Later on POE+ standard was evolved. Switches which are complied to POE+ standard can provide 30W of power to the connected devices.

Latest standard in this series is UPOE which is not a universal standard but a cisco Proprietary. According to which UPOE enabled switches can provide 60 W of power to the connected devices. Now we can power up not only phones but also PCs/Laptops from the switches.

Below are few more differences.

 

RJ45 to RJ45 Console Cable

I saw there is RJ45 to RJ45 console cable is available on Cisco site.  It has RJ45 connector at both the ends.

It looks like this:-

But How can we use it?

Can we connect it to our laptop's ethernet port?

   

Then, after lot of research I came to know that we cannot use this cable direct with laptop.

We have to have a RJ45 to DB9 connector (if DB9 is available on the machine) and another adaptor DB9 to USB incase DB9 is not available in your machine.            

RJ45 to RJ45 cable is used for access server with RJ45 ports like Digiport server or Blackbox console device to Cisco device connectivity.                 

The pinouts for RJ45 to RJ45 console cable is given below:-

Cisco EOL SFP's and its replacement

Cisco has announced EOL notification for many SFPs. Below are the few common Cisco SFPs and their replacement.

Baby Gaint Frame Vs Jumbo Frame...

Frames which are up to 1600 Bytes are called as Baby Gaint.

Ethernet frames from 1600 to 9216 Bytes are known as Jumbo frames.

OSPF configuration example on Nexus switches

Below is the OSPF configuration example on Nexus switches. Here OSPF is enable on the directly connected interface between 7K switches.

N7K-1:-

Step 1:- Enable OSPF feature

N7K-1(config)# feature ospf

Step 2:- Enable OSPF Process

N7K-1(config)# router ospf 10  --<<<< OSPF process ID N7K-1(config-router)# router-id 10.1.1.1

Step 3:- Enable ospf on particular interface

N7K-12-1(config-router)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.1 255.255.255.252 N7K-12-1(config-if)# ip router ospf 100 area 0

N7K-2:-

Step 4 :- Enable OSPF feature

N7K-2(config)# feature ospf

Step 5:- Enable OSPF Process

N7K-2(config)# router ospf 100  --<<<< OSPF process ID N7K-2(config-router)# router-id 10.1.1.2

Step 6:- Enable ospf on particular interface.

N7K-2(config)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.2 255.255.255.252 N7K-2(config-if)# ip router ospf 100 area 0

Step 7 :-  Optional- Below command can be used if we want to disable the neighborship on particular interface.

N7K-1(config)# int Eth1/1 N7K-1(config-if)# ip ospf 100 passive-interface ---< To disable neighborship but still advertise the network N7K-1(config-if)# ip ospf network point-to-point --<< To change the network type

Verification :-

A. Show ip ospf neighbor

N7K-1# sh ip ospf neighbors  OSPF Process ID 100 VRF default  Total number of neighbors: 1  Neighbor ID     Pri State       Up Time  Address      Interface  100.1.1.2         1 FULL/ -     00:00:08 100.1.1.2       Eth1/1

EIGRP configuration example on Nexus 7K switches

Below is the EIGRP configuration example on Nexus switches. Here EIGRP is enable on the directly connected interface between 7K switches.

N7K-1:-

Step1 :- Enable EIGRP feature

N7K-1(config)# feature eigrp

Step2:- Enable EIGRP Process

N7K-1(config)# router eigrp 100 N7K-1(config-router)# router-id 10.1.1.1

Step3:- Enable eigrp on particular interface

N7K-12-1(config-router)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.1 255.255.255.252 N7K-12-1(config-if)# ip router eigrp 100

N7K-2:-

Step4 :- Enable EIGRP feature

N7K-2(config)# feature eigrp

Step5:- Enable EIGRP Process

N7K-2(config)# router eigrp 100 N7K-2(config-router)# router-id 10.1.1.2

Step6:- Enable EIGRP on particular interface.

N7K-2(config)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.2 255.255.255.252 N7K-2(config-if)# ip router eigrp 100

Step7 :-  Optional- Below command can be used if we want to disable the neighborship on particular interface.

N7K-1(config)# int Eth1/1 N7K-1(config-if)# ip passive-interface eigrp 100 ---< To disable neighborship but Still advertise the network N7K-1(config-if)# ip eigrp 100 shutdown  --<< To disable EIGRP on interface. Both hello packet and advertisement will be stopped.

Verification :-

A.Show ip eigrp neighbor

N7K-1(config-if)# sh ip eigrp neighbors IP-EIGRP neighbors for process 100 VRF default H   Address                 Interface       Hold  Uptime  SRTT   RTO  Q  Seq                                             (sec)         (ms)       Cnt Num 0   10.1.1.2               Eth1/1         14   00:00:42  9    200   0   3

   B.Show ip route

N7K-5-1# sh ip route IP Route Table for VRF "default" '*' denotes best ucast next-hop '**' denotes best mcast next-hop '[x/y]' denotes [preference/metric] 10.1.1.0/30, ubest/mbest: 1/0, attached     *via 10.1.1.2, Eth1/1, [0/0], 00:20:41, direct 10.1.1.2/32, ubest/mbest: 1/0, attached     *via 10.1.1.2, Eth1/1, [0/0], 00:20:41, local 200.1.1.0/24, ubest/mbest: 1/0     *via 10.1.1.1, Eth1/1, [90/3072], 00:00:09, eigrp-100, internal

Nexus - HSRP Configuration example

Below is the HSRP configuration example.

Below is the HSRP configuration example.

N7K-1:-

feature hsrp

feature interface-vlan

vlan 100

int eth1/1

switchport mode trunk

 no shut

int vlan 100

ip address 100.1.1.2/24

hsrp 100

ip 100.1.1.1

preempt

priority 105

 no shut

N7K-2:-

feature hsrp

feature interface-vlan

vlan 100

int eth1/1

switchport mode trunk

 no shut

int vlan 100

ip address 100.1.1.3/24

hsrp 100

ip 100.1.1.1

preempt

no shut

Verification:-

1.  show hsrp brief

N7K-1#show hsrp brief P indicates configured to preempt. | Interface Grp Prio P State Active addr Standby addr Group addr Vlan100   100 105  P Active    local  100.1.1.3 100.1.1.1

2. show hsrp interface vlan 100

N7K-1#show hsrp interface vlan 100 Vlan100 - Group 100 (HSRP-V1) (IPv4)   Local state is Active, priority 105 (Cfged 105), may preempt       Forwarding threshold(for vPC), lower: 1 upper: 105   Hellotime 3 sec, holdtime 10 sec   Next hello sent in 0.821000 sec(s)   Virtual IP address is 100.1.1.1 (Cfged)   Active router is local   Standby router is 100.1.1.3 , priority 100 expires in 0.411000 sec(s)   Authentication text "cisco"   Virtual mac address is 0000.0c07.ac64 (Default MAC)   1 state changes, last state change 00:04:11   IP redundancy name is hsrp-Vlan100-100 (default)