R&S Quick Notes – Frame-Relay/PPP

Frame-Relay

• DHCP on a frame interface : “frame-relay interface-dlci 555 protocol ip 166.166.166.2”
• When asked to disable INARP, be sure to do so on physical interfaces any multipoint sub-interfaces.
• If you see 0.0.0.0 frame mappings, save your config and reload.
• The backup command CANNOT be used on FR physical interfaces. (no way to detect when back up)
• Back-to-Back frame connections, disable keepalives with “no keep”
• LMI keepalives sent every 10 seconds. This interval can NOT be changed.
• LMI Full Status Updates are requested every 60 seconds. CAN be changed with “frame lmi-n391dte”.
• To ping local interface IP, add a mapping for local IP with any valid DLCI.

PPP

• To do “?” in authentication password, use either ESC-Q or CRTL-V.
• If two routers both using CHAP has the same hostname “no ppp chap ignoreus” is required.
• “ppp authentication eap” can be used as alternative to chap when md5 needed.
• “ppp link minimum” – amount of links required for a MLP bundle to up.
• With CHAP and PAP, know which side is the client and who is authenticating who!
• Know PPPoFR, MLP, and the mix combination formats