From: Dave Gahm (gahm@xxxxxxx)
Date: Sun Jan 23 2000 - 16:27:06 GMT-3
Denton,
Maybe I can clarify a couple points on ATM.
The 0 16 ilmi pvc is used by ilmi to allow an edge switch to learn it's NSAP
prefix from the ATM switch it is connected to. If you assign an NSAP address
out of the blue to an edge switch you must be sure that the core ATM switch
knows how to route calls to that ATM address, either through static maps
(IISP) or dynamically through PNNI. NSAP addresses can be either public or
private, and when building an ATM network you would assign addresses
hierachically (sp?) to facilitate routing. In a small self-contained campus
environment you do not have to get too fancy and could use something like
39.00.aa.01 (02 for a second switch) as a prefix and let the switches
assign their MAC addresses as the ESI bytes. If you then added another
location you could use 39.00.bb.
The 0 5 qsaal pvc is used for call setup. Similar to ISDN D channel layer 3.
A call is placed to a NSAP address and a SVC vpi vci pair is established
end-end for the duration of the call. CLIP or LANE provides the means to map
IP or MAC to ATM addresses.
Here is a couple LANE config examples from a 7513 router with AIP cards. The
first config for ATM1/0 is running in a production network. This config
defaults to use the well-known LECS address. The LANE services are running
on a BAY BH5000. The 7513 picks up its NSAP prefix via ILMI from a BH5000.
It then adds its MAC address and selector byte to form the ESI. Very simple
to configure.
interface ATM1/0
mtu 9180
no ip address
atm pvc 1 0 16 ilmi
atm pvc 2 0 5 qsaal
!
interface ATM1/0.2 multipoint
mtu 1500
ip address 136.XXX.XXX.XXX 255.255.255.0
lane client ethernet floors_2-5_IP
On ATM3/0 I set up a test config with the LECS and LES/BUS servers
configured on the 7513. The show command gives you the NSAP address needed
to setup the lane database (LECS). Note the last byte will be the
subinterface (in hex, 13hex =19) where the lane server (LES/BUS) will be
configured. I set up 2 ELANs, BigDave and SmallFred. The lane config command
assigns the LECS to the physical interface. The lane
fixed-config-atm-address command assigns the well-known LECS address
(47.00.79 etc). Under the subinterfaces you build the LES/BUS server and
also a client (LEC) if you want the router to pass traffic on that ELAN.
This config will provide layer 2 connectivity through the ATM cloud, but
would of course need IP, or IPX, or Appletalk commands for layer 3. Note
that both sub-interfaces will use the well known address to find the LECS.
The lane fixed-config-atm-address is not really needed on .20.
ano7513a#show lane default-atm-addresses inter atm3/0
LANE Client: 39.AABBCC000000000000000000.00000C755160.**
LANE Server: 39.AABBCC000000000000000000.00000C755161.**
LANE Bus: 39.AABBCC000000000000000000.00000C755162.**
LANE Config Server: 39.AABBCC000000000000000000.00000C755163.00
note: ** is the subinterface number byte in hex
lane database DaveTest
name BigDave server-atm-address
39.AABBCC000000000000000000.00000C755161.14
name SmallFred server-atm-address
39.AABBCC000000000000000000.00000C755161.13
interface ATM3/0
no ip address
no ip mroute-cache
lane config DaveTest
lane fixed-config-atm-address
atm pvc 1 0 16 ilmi
atm pvc 2 0 5 qsaal
!
interface ATM3/0.19 multipoint
lane server-bus ethernet SmallFred
lane client ethernet SmallFred
!
interface ATM3/0.20 multipoint
lane fixed-config-atm-address
lane server-bus ethernet BigDave
lane client ethernet BigDave
ano7513a#sh lane int atm3/0.19
LE Server ATM3/0.19 ELAN name: SmallFred Admin: up State: operational
type: ethernet Max Frame Size: 1516
ATM address: 39.AABBCC000000000000000000.00000C755161.13
Config Server being used: 47.007900000000000000000000.00A03E000001.00 vcd:
52 (w
ell known)
control distribute: vcd 54, 1 members, 0 packets
proxy/ (ST: Init, Conn, Waiting, Adding, Joined, Operational, Reject, Term)
lecid ST vcd pkts Hardware Addr ATM Address
1 O 49 0 0000.0c75.5160
39.AABBCC000000000000000000.00000C755160.13
LE BUS ATM3/0.19 ELAN name: SmallFred Admin: up State: operational
type: ethernet Max Frame Size: 1516
ATM address: 39.AABBCC000000000000000000.00000C755162.13
data forward: vcd 58, 1 members, 55892 packets, 0 unicasts
lecid vcd pkts ATM Address
1 55 55892 39.AABBCC000000000000000000.00000C755160.13
LE Client ATM3/0.19 ELAN name: SmallFred Admin: up State: operational
Client ID: 1 LEC up for 39 days 18 hours 58 minutes 55
seconds
Join Attempt: 1
HW Address: 0000.0c75.5160 Type: ethernet Max Frame Size: 1516
ATM Address: 39.AABBCC000000000000000000.00000C755160.13
VCD rxFrames txFrames Type ATM Address
0 0 0 configure
47.007900000000000000000000.00A03E000001.00
50 0 0 direct
39.AABBCC000000000000000000.00000C755161.13
53 0 0 distribute
39.AABBCC000000000000000000.00000C755161.13
56 0 55892 send
39.AABBCC000000000000000000.00000C755162.13
57 55892 0 forward
39.AABBCC000000000000000000.00000C755162.13
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