Saturday , November 18 2017

Multiple Spanning Tree Protocol on Huawei switch

The Multiple Spanning Tree Protocol (MSTP) was originally defined as the IEEE 802.1s standard protocol. Now the standard IEEE 802.1Q-2005 includes MSTP. The basic role of this protocol is to prevent L2 loops. I do not want to explain MSTP in details, as this can be easily found on the Internet. I just want to show you:

  • how to configure this protocol using Huawei CLI
  • how to load balance traffic over redundant links.

Let’s assume that we have the following physical topology:

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GVRP configuration on Huawei switches

GVRP stands for GARP VLAN Registration Protocol and is a GARP application that registers and deregisters VLAN attributes. It uses Generic Attribute Registration Protocol (GARP), to maintain and propagate dynamic VLAN registration information, throughout GVRP enabled devices on the network.

GVRP lets a device to propagate local VLAN registration information to other participant devices, and to dynamically update the VLAN registration information from other devices to its local database, including active VLAN members and through which port they can be reached. All GVRP participants on a bridged LAN maintain the same VLAN registration information. The VLAN registration information includes both manually configured local static entries and dynamic entries from other devices.

There are 3 different registration modes:

  1. Normal – allows dynamic VLAN registration and deregistration on the trunk port, and allows the declarations for dynamic and static VLANs to be sent.
  2. Fixed – prevents dynamic VLAN registration and deregistration on the trunk port, and allows only the declarations for static VLANs to be sent.
  3. Forbidden – prevents dynamic VLAN registration and deregistration on the trunk port, and allows only the declarations for VLAN 1 to be sent.

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Frame Relay interface on Huawei router

Let’s assume that we have a Frame Relay topology like in the picture below. We want to have full IP connectivity between our ‘labnario’ routers. To demonstrate, how to configure different types of Frame Relay interface, I will use:

  • physical serial interface on labnario1 router
  • logical point-to-point interface on labnario2 router
  • logical point-to-multipoint interface on labnario3 router.

Let’s start with labnario1 configuration.

[labnario1]interface Serial0/0/0
[labnario1-Serial0/0/0] link-protocol fr
[labnario1-Serial0/0/0] fr map ip 102 broadcast
[labnario1-Serial0/0/0] fr map ip 103 broadcast
[labnario1-Serial0/0/0] ip address

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from Huawei CLI – capture-packet …

Network administrators often need to capture packets, on switches or routers, to locate faults. Some devices do not support remote mirroring, that’s why administrators have to go on-site to capture packets, using local mirroring.

We have a useful command (capture-packet …), on some devices, to catch packets remotely. When taking S5700 switch into consideration, we can capture all packets from an interface (port mirroring) or packets matching specified rules (traffic mirroring). These capture packets can be sent to FTP or TFTP servers and displayed on terminal screen. CX600 and NE40E routers with V6R3 software version can send capture packets to local CF card (name.cap file).

Let’s look at this command:

[Huawei]capture-packet ?
  acl        Acl
  cpu        Packet send to cpu
  interface  Ingress Interface

As you can see you can use port or traffic mirroring. You can also catch packets sent to CPU.

[Huawei]capture-packet interface GigabitEthernet 0/0/1 destination ?
  ftp-server   Send to ftp server
  terminal     Output terminal
  tftp-server  Send to tftp server

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how to configure trunk between Huawei router and switch

What we want to do is to configure 802.1q trunk between labnario1 router and labnarioSW1 switch, so that hosts from VLAN 100 will be able to ping the router’s interface.

Let’s look at the simple topology:

First we want to configure labnario1 router. To configure Ge0/0/1 interface to operate as a 802.1q trunk, we need to configure it as follows:

[labnario1]interface GigabitEthernet 0/0/1
[labnario1-GigabitEthernet0/0/1]port link-type trunk

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