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…
