Archive for the ‘router’ Category

Send yours music by AirPlay to music stereo system

1 lipca 2018 Dodaj komentarz

We can transfer music from iPad to stereo music system by AirPlay. We need an only android phone and AirPlay software downloaded from Google Play. Below is showed a diagram that presents this technology. Android phone is connected by headphone connector to the stereo music system. Music from iPad to the Android phone and next to stereo music system is flowed by a WiFi connection. AirPlay Apple is fantastic technology by their you can send your favorite music to music stereo system.


18 lipca 2017 Dodaj komentarz

Poster static-lsp SAS7210 -1Poster static-lsp SAS7210 -2

PTP IEEE1588-2008 accuracy and test

9 lipca 2017 Dodaj komentarz

The accuracy of the PTP IEEE1588-2008 on the SAS7210-T MPLS router is shown in figures below.

Depending on the stability of the GM (General Master Clock) , the accuracy of clock recovery by the PTP protocol is 10^-9 to 10^-10 .


BGP konfiguracja na przykładzie routera 7750SR

2 lipca 2017 Dodaj komentarz


Configuration DHCP local server in router 7750SR

22 czerwca 2017 Dodaj komentarz


Kategorie:7750SR, DHCP, router

MVR multicast protocol layer 2

22 Maj 2017 Dodaj komentarz

Multicast VLAN Registration protocol in Cisco switches deliver multicast packets received from a source VLAN to destination VLAN. Multicast routing has to be disabled when MVR is enabled. Multicast traffic can be delivered to the source VLAN by a port. This port can be work in trunk or access mode. Multicast traffic will be received from destination VLAN by a port or ports. These ports have to works in access mode only. These ports call subscribers ports.
When we want to configure MVR in a switch we have to configure in global configuration and in subscribers ports.
In the global configuration, we set up source VLAN and a  multicast group which will be transferred do the destination VLAN to the subscriber’s ports.

mvr vlan 611
mvr querytime 10
mvr mode dynamic
mvr group
mvr group
mvr group

In subscriber’s ports are configured multicast groups which we needed receive.

interface FastEthernet0/24
 switchport access vlan 621
 switchport mode access
 mvr type receiver
 mvr vlan 611 group
 mvr vlan 611 group
 mvr vlan 611 group
 mvr immediate
Parallel to the MVR protocol can work properly IGMP protocol.

ip igmp snooping vlan 621 static 0100.5e00.020a interface Fa0/24
ip igmp snooping vlan 621 static 0100.5e28.0a08 interface Fa0/24


ip igmp snooping vlan 621 static interface Fa0/24
ip igmp snooping vlan 621 static interface Fa0/24
ip igmp snooping vlan 621 static interface Fa0/24



Multicast routing pim sparse mode in Cisco routers – example

15 Maj 2017 Dodaj komentarz
When we want to configure multicast routing pim sparse mode in Cisco router please read this example.
First, we have to run multicast routing.
ip multicast-routing
Protocol ip pim sparse mode works properly only when exists rendezvous point (RP). We have to create rendezvous point in the router. In this case, we create a loopback interface for example:
interface Loopback1
ip address
ip pim sparse-mode
Next, we have to connect rendezvous point with the loopback address.
ip pim rp-address
We to assume that VLAN 500 will be input VLAN and VLAN 600 will be output.
We have to create properly interface VLAN like below:
interface VLAN 500
ip address
ip pim sparse-mode
interface VLAN 600
ip address
ip pim sparse-mode
ip igmp static-group
The last line informs router that selected multicast group is carried from VLAN 500 to VLAN 600.
Finally, we have to switch on IGMP SNOOPING on selected interface for selected multicast group in output VLAN like below:
ip igmp snooping vlan 600 static 0100.5e00.020a interface Gi1/9 – same routers to
require mac address for the multicast group
or for other routers, the command line is:
ip igmp snooping vlan 600 static interface Gi1/9