Black Box LRU4240 - Manual (Page 53)

Dual Trunk E1 Router
Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 41
LMI message types consist of:
• STATUS INQUIRY
STATUS INQUIRY messages are used to request information on PVCs and their associated
DLCIs. These Inquiries can be used to ask the receiving LMI-enabled device about all of the
PVCs it knows about. Annex D also supports inquiries about individual DLCIs.
• STATUS
STATUS messages are the replies to Status Inquiries.
The Dual Trunk E1 Router supports both UNI-U and UNI-N
Manual DLCI configuration
You can enter the DLCIs manually in Menu-0E “Performance monitoring cofniguration”. Each
DLCI is a sub-interface of a network port (NET1, NET2, or NET). For each DLCI you would enter
the Committed Information Rate (CIR), and the remote far end network attached to the DLCI. The
delay threshold parameter in the table is relevant only if RMON-1 performance monitoring is
enabled.
Mapping DLCIs to IP Addresses
To send IP traffic on a DLCI interface requires address resolution to the next hop IP address. The
mapping of of link layer addresses (DLCIs) to the next hop IP address can be done manually (static
configuration) or automatically (dynamic configuration) using inverse ARP protocol (RFC2390).
When a DLCI is discovered, the router sends an inverse ARP request to the remote router or edge
router. The ARP response messages will trigger the updating of the DLCI to IP Map table.
When a PVC is deleted the table entries associated to the deleted DLCI will are automatically
removed. Entries learned through inverse ARP can be deleted manually from the table.
Manual mapping of DLCIs to IP addresses can also be entered in the DLCI to IP Address table from
Menu-$IA Frame Relay DLCI IP Map Table.
NOTE: Physical layer loss of signal does not immediately trigger deletion of the dynamically learnt mappings. After loss
of signal and failure of LMI retries, LMI status goes down and DLCIs get deleted. At this point mappings are also deleted
(made inactive).
C
ONFIGURING
SLIP
SLIP (Serial Line Interface Protocol) is a TCP/IP protocol that allows IP packets to be transmitted
over the COMM port. This is configured using Menu 0A - Interface Configuration.
Table 4-12 Configuring COMM port IP address
Procedure Steps
Set COMM Port IP address 1.Set Menu-0A COMM IP address and subnet mask