03-07-2006 04:30 AM - edited 03-03-2019 11:58 AM
hi,
i have a 7206 router which is connected to a providers atm network.
there is a branch on the other side which has a connection to the central 7206 over a frf8 connection.
this means this router is connected to a fr network and the provider does the fr_to_atm conversation.
it is workil´ng well, but we have no cdp-information about the 7206 at the it
branche end.
it seems that the cdp paket which the 7206 sends out never comes to the branch router.
7206-config:
interface ATM3/0
description MPLSRBGOPE02: phy.Link to MPLSRBGOLS02 (ATM3/0)
no ip address
logging event subif-link-status
load-interval 30
no atm ilmi-keepalive
cdp enable
!
!
interface ATM3/0.150 point-to-point
description MPLSRBGOPE02: ***** Verbdg. zu r-mauthau1 (ATM3/0.150) *****
bandwidth 512
ip address 10.22.63.25 255.255.255.252
ip mtu 1500
cdp enable
pvc 1/50
vbr-nrt 1536 574 200
encapsulation aal5snap
max-reserved-bandwidth 95
service-policy output queue_trunc
!
Konfig from the branch router:
interface Serial0/0
description r-mauthau1: phy. FrameRelay-Interface (Se0/0)
bandwidth 1920
no ip address
max-reserved-bandwidth 95
encapsulation frame-relay IETF
load-interval 30
no fair-queue
cdp enable
frame-relay traffic-shaping
frame-relay lmi-type q933a
!
interface Serial0/0.1 point-to-point
description r-mauthau1: Verbg. zu MPLSRBGOPE02 (Se0/0.1)
bandwidth 512
ip address 10.22.63.26 255.255.255.252
frame-relay class 512k
frame-relay interface-dlci 16
!
any idea ??????????
03-07-2006 04:38 AM
Hi,
When using FRF8 in translational mode, the payload information carried in the RFC1490 FR packets has to be translated into RFC1483 ATM packets. This means that the provider switches have to have knowledge of CDP for this to happen. In general, they will not have knowledge of CDP and will not be able to translate the packets. That is why you do not see the CDP information across FRF8 interfaces.
One option you have, if your provider supports it, is to use FRF.8 in transparent mode, in which case you do not need the provider to translate between FR and ATM payloads. But I'm not sure you would want to do all that for CDP information...
Hope that helps - pls rate the post if it does.
Paresh
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