Labnario Huawei From Scratch

ISIS is a link-state IGP protocol. It gathers routing information from adjacent neighbors and uses the SPF algorithm to determine the best paths to destinations.

I wouldn’t like to focus on the theory because you can find it in many sources.

Let’s configure ISIS protocol based on the following topology:

Configure IP addresses of physical and loopback interfaces on all routers (it is omitted here):

I have busy time now and a frequency of updating my blog is not such as I would expect. Sorry for that. I hope it should be better soon.

But today I would like to ask you a simple riddle.

Let’s assume that we have S9300 switch and a fragment of its configuration:

#
observe-port 1 interface Ethernet0/0/1
#
acl number 3000
rule 5 deny ip source 89.168.24.0 0.0.0.255
rule 10 deny ip source 91.10.10.0 0.0.0.255
rule 15 permit ip
#
traffic classifier riddle operator and
if-match acl 3000
#
traffic behavior riddle
mirroring to observe-port 1
statistic enable
#
traffic policy riddle
classifier riddle behavior riddle
#
interface Ethernet0/0/10
traffic-policy riddle inbound

Spanning Tree protocol is a loop prevention mechanism in a bridged LAN. Every STP topology has its own root bridge, which determines how STP topology is calculated. The role of the root bridge is to act as a reference point in the network, so that all other switches can determine, how far each of their ports is from the root bridge. The port, which has the lowest path cost, is placed into a forwarding state. All other ports, that can lead to the root bridge, are blocked. Ports in the switching topology, which lead away from the Root Bridge, remain forwarding. You can recall STP operations reading the following article: “Multiple Spanning Tree Protocol on Huawei switch“.

How does the root bridge election process work?

The root bridge for each STP instance is determined by the bridge ID. The bridge ID consists of a configurable bridge priority and the MAC address of the bridge:

[Huawei]display stp
-------[CIST Global Info][Mode MSTP]-------
CIST Bridge         :32768.4c1f-ccd4-1c03

We have waited for a new version of Huawei eNSP simulator since February 1st, 2013.

And we have finally got it.

Quite new and fresh V100R002C00B110 version.

New look … new devices … new connections …

Today a few words about 2 simple but useful commands: lock and send.

LOCK – prevents unauthorized users from operating on the current terminal interface

SEND – enables the system to transfer messages between user interfaces

Let’s look how they work on Huawei S5700 switch.

LOCK

<labnario>lock
Enter Password:
Confirm Password:

 Info: The terminal is locked. 

Enter Password:

<labnario>