Administrative Distance

    eigrp summary route 5
    external bgp 20
    internal eigrp 90
    igrp 100
    ospf 110
    rip 120
     external eigrp 170
     internal bgp 200
 
Multicast Addresses

      224.0.0.1 – All systems on this subnet
      224.0.0.2 – All routers on this subnet
      224.0.0.5 – ospf all routers 
      224.0.0.6 – ospf dr routers
      224.0.0.9 – rip2 routers
      224.0.0.10 – igrp/eigrp routers

Jumbo frames – extends ethernet frame size up to 9000 bytes from the normal ethernet frame size is 1500 byte. 

MSS is MTU minus TCP/IP headers (40 bytes).

IPv6 – allows packets up to 4GB in frame size.

What is the difference between MPLS and VPLS?

MPLS allows customers to define virtual circuit services in a meshed connectivity.  At the same time, it improves security.  The following are some highlights:

  – runs over an IP backbone  
  – customer can assign different traffic levels, 4 or 5, for QoSing
   – it can scale over hundred of sites

VPLS is based on Ethernet and runs on Layer 2.    The following are highlights:

   - uses MPLS as a backbone
  -  for simple networks, from 10 sites to 100s of sites

Which is better for VoIP?

Use VPLS your network is smaller, ranging from 10 to 100 of regional/remote sites. 

Use MPLS if the network is more complex and will scale over 100s to 1000s of sites.

Asterisk has transformed the telephony world like Unix revolutionized Operating system. As it is with any open source application asterisk is not just a telephony system it is much more.

In this small article we will see integration of open fire with Asterisk

Os: Centos
Asterisk Version : 1.4
Openfire
Spark (sip phone)

1. Download & install rpm of openfire
wget http://www.igniterealtime.org/downloadServlet?filename=openfire/openfire-3.6.4-1.i386.rpm
rpm -ivh openfire-3.6.4-1.i386.rpm

2. Install java package
yum install java

3. Start open fire application
/etc/init.d/openfire start

4. Enter http://127.0.0.1:9090/ or http://your system ip:9090 in web browser
You will presented with installation. Choose language of your choice then enter the ip of system in domain.Note if you want to make it public enter the static ip in domain. I went for embedded database. Enter a desired admin password and login

5. Click on Plugin to download your desired plugins

6. Create a new user from user section

7. Chooser Server -> Phones -> Add new phone mapping
You are done with configuration.

8. Download spark and enter username and password you created in user section. You should have a voice as well as IM based application

The 3Packet.com site is complete. I’ll be fixing the RSS feeds for the blog and adding some content to the blog shortly.. Please stay tuned…

Started work on the 3Packet.com website…

3Packet.com provides VOIP Phone, data and internet connectivity, and security firewall + vpn network services. Our engineers have years of experience in the networking field and are Cisco or Asterisk certified. Please contact us for any inquiries or questions that you may have.

info@3packet.com
714-707-4211