Protocol Independent routing First lets configure the interfaces. root@A> show configuration | display set | match interfaces set interfaces em0 unit 0 family inet address 2.2.2.1/30 set interfaces em1 unit 0 family inet address 1.1.1.1/30 ———————————————- root@B> show configuration | display set | match interfaces set interfaces em0 unit 0 family inet address 1.1.4.1/30 set…More ..read more

Scenario 1: iBGP configuration.   Generally, internal BGP (IBGP) speakers need to be fully meshed because IBGP does not readvertise updates to other IBGP speakers. This full mesh requirement does not scale when there are large number of IBGP speakers,as within an AS n*(n-1)/2 unique ibgp sessions must be maintained which doesn’t scale with finite…More ..read more

As Network Engineers, One thing we all have to do is – Configuration Preparation for Network Devices. We generally start with a standard template of configuration with variables, and replace them with values to prepare Configuration Files. Let’s attempt to automate the above process. But before that, lets carefully construct the steps we generally follow…More ..read more

Scenario 1 IGP Configuration IS-IS   *All routers are configured for Level 2, therefore default CSPF LSPs can occur. To configure IS-IS and establish IS-IS adjacencies, follow these steps: 1. Enable IS-IS on Routers in Your Network. root@Chennai# set protocols isis level 1 disable root@Chennai# set protocols isis interface all level 2 metric 10 root@Chennai#…More ..read more

S.No Function & inputs Output Description 1 finditer(pattern, string, flags=0) Iterator with match objects For each match, Iterator returns a match object 2 fullmatch(pattern, string, flags=0) Match Object (or) None Tries to apply pattern to all of the string 3 match(pattern, string, flags=0) Match Object (or) None Tries to apply pattern at the start of…More ..read more

Scenario 1 Part 1:Configure the Interfaces. b.IPv6 Addressing.   Things to know before configuring IPv6 addressing. Address Formats:: – Global Unicast Address consists 48 bit Global Prefix,16 bit subnet & 64 bit Interface ID – link Local unicast consists FE80::/64 and interface ID. – Multicast Addresses starts with FF00::/8   *The IETF (Internet Engineering Task…More ..read more

Configure the interfaces as shown in figure,and check connectivity at link level. Now,let us configure OSPF on all devices as shown in figure. root@J1# set protocols ospf area 0.0.0.0 interface lo0 passive root@J1# set protocols ospf area 0.0.0.0 interface em0 root@J1# set protocols ospf area 0.0.0.1 interface em1 root@J2# set protocols ospf area 0.0.0.0 interface…More ..read more

root@A# set interfaces em0.0 family inet address 10.0.0.1/30 root@A# set interfaces lo0.0 family inet address 1.1.1.1/32 root@A# set routing-options autonomous-system 1111 root@A# set protocols bgp group exter type external root@A# set protocols bgp group exter local-address 10.0.0.1 root@A# set protocols bgp group exter neighbor 10.0.0.2 peer-as 2222   root@B# set interfaces em0.0 family inet address…More ..read more

Scenario 1: IGP Configuration OSPF -Let’s configure a manual RID to avoid possible problems when OSPF RID changes i.e when multiple loopback addresses are configured. -all routers have traffic engineering enabled so that SPF algorithm takes into account various LSPs configured under MPLS and configures OSPF to generate link-state advertisements (Opaque LSAs) that carry traffic…More ..read more

Scenario 1 Part 1:Configure the Interfaces. a.IPv4 Addressing. Since i’m working on junos-Olive platform,you will see em interfaces which i guess stands for emulator interfaces.As the Qemu machines got booted,i got the prompt at root level. As i logged in for the very first time,i must assign the router,a hostname and also a password. root@Delhi#…More ..read more