Powered by Blogger.
Home » Posts filed under Load Balancing
Showing posts with label Load Balancing. Show all posts
Showing posts with label Load Balancing. Show all posts

GLBP Gateway load balancing protocol

Posted by Unknown Friday, March 22, 2013 0 comments
GLBP or Gateway load balancing protocol is used for load balancing and gateway redundancy in a network. Instead of giving actual MAC addressed with the default gateway, the GLBP group provides virtual MAC to the requesting hosts, which can be used further in creating network redundancy. Some of the main components of GLBP are:

  • Active Virtual Gateway
  • Active Virtual Forwarder
Active virtual gateway takes care of all virtual MAC assignments in the network. In case of its failure, active virtual forwarder with second highest priority takes its place.

 Quick Facts:
  • GLBP uses 224.0.0.102 UDP/3222
  • GLBP default Hello interval is 3 seconds
  • GLBP has virtual MAC 0007.b4xx.xxyy with xx being group number and yy being forwarder number
  • GLBP allows up to 4 virtual MAC address per group
  • Elected Active Virtual Gateway (AVG) assigns/revokes virtual MAC to/from group members
  • Each gateway is an Active Virtual Forwarder (AVF) and answers own ARP request
--to be continued--


VRRP GNS3

Posted by Unknown Thursday, January 31, 2013 0 comments


_________________________________________________
R1#show running-config 
Building configuration...

Current configuration : 770 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef

!
no ip domain lookup
ip domain name lab.local

!
interface FastEthernet0/0
 ip address 192.168.1.1 255.255.255.0
 duplex auto
 speed auto
!         
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
ip route 0.0.0.0 0.0.0.0 192.168.1.10
!
no ip http server
no ip http secure-server
!
control-plane

!         
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end
_________________________________________________________
R2#show running-config 
Building configuration...

Current configuration : 770 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef

!
no ip domain lookup
ip domain name lab.local
!
interface FastEthernet0/0
 ip address 192.168.1.2 255.255.255.0
 duplex auto
 speed auto
!         
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
ip route 0.0.0.0 0.0.0.0 192.168.1.10
!
no ip http server
no ip http secure-server
!
control-plane
!         
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

______________________________________________________
R3#show running-config 
Building configuration...

Current configuration : 968 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef

!
no ip domain lookup
ip domain name lab.local

!
interface FastEthernet0/0
 mac-address 0033.3333.3333
 ip address 192.168.1.3 255.255.255.0
 duplex auto
 speed auto
 vrrp 1 ip 192.168.1.10
 vrrp 1 timers advertise 3
 vrrp 1 timers learn
 vrrp 1 priority 120
 vrrp 1 authentication cisco
!
interface FastEthernet0/1
 ip address 192.168.3.3 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 4
 network 192.168.1.0
 network 192.168.3.0
 auto-summary
!
!
no ip http server
no ip http secure-server
!
!
!
!         
control-plane

line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end
______________________________________________________
R4#show running-config 
Building configuration...

Current configuration : 947 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
no ip domain lookup
ip domain name lab.local
!
interface FastEthernet0/0
 mac-address 0044.4444.4444
 ip address 192.168.1.4 255.255.255.0
 duplex auto
 speed auto
 vrrp 1 ip 192.168.1.10
 vrrp 1 timers advertise 3
 vrrp 1 timers learn
 vrrp 1 authentication cisco
!
interface FastEthernet0/1
 ip address 192.168.2.4 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 4
 network 192.168.1.0
 network 192.168.2.0
 auto-summary
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end     
_______________________________________________
R5#show running-config 
Building configuration...

Current configuration : 893 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R5
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
no ip domain lookup
ip domain name lab.local     
interface Loopback5
 ip address 10.0.0.4 255.255.255.0
!
interface FastEthernet0/0
 ip address 192.168.3.5 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 192.168.2.5 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 4
 network 10.0.0.0
 network 192.168.2.0
 network 192.168.3.0
 auto-summary
!
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!         
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

GLBP Gateway Load Balancing Protocol

Posted by Unknown Saturday, January 26, 2013 0 comments

I was working on an assignment involving GLBP implementation for Network Redundancy. I was totally un aware of this Protocol. Although i had some exposure to HSRP but was not aware of GLBP! This was totally an alien concept for me. Thankful to Mr Keith Barker! Who has made an outstanding video on Youtube, covering all the basics of GLBP and giving a detailed overview of its configurations. In this video Keith has covered almost all of the major components related to GLBP. A must watch video for a Network Engineer.







Quick Facts:

  • GLBP uses 224.0.0.102 UDP/3222
  • GLBP default Hello interval is 3 seconds
  • GLBP has virtual MAC 0007.b4xx.xxyy with xx being group number and yy being forwarder number
  • GLBP allows up to 4 virtual MAC address per group
  • Elected Active Virtual Gateway (AVG) assigns/revokes virtual MAC to/from group members
  • Each gateway is an Active Virtual Forwarder (AVF) and answers own ARP request








Copyright © My CISCO Journal . All rights reserved.