PPP Host Routes

The output of the show ip route command might differ between PPP and HDLC encapsulations when IP unnumbered configuration is used on serial interfaces. PPP installs a host route to the IP address that is used on the serial interface at the other end as a directly connected network. If the same prefix is also learned through OSPF as in this configuration, it displays only as a connected route. This is because connected routes have a lower administrative distance than OSPF and are more preferred. You can change this behavior when you issue the "no peer neighbor-route" command under the serial interfaces which prevents a host route from being installed and treats it as an OSPF route.

This is not the case with HDLC because it does not install a host route. HDLC installs an OSPF route for the address on the other end when IP unnumbered is used.

Frame-Relay Traffic Shaping & Compression

Frame-Relay Traffic Shaping

interface ser 0/0/0
    frame-relay traffic-shaping
        frame-relay class "name"
frame-relay interface-dlci xxx
    class "name"

map-class frame-relay "name"
    frame-relay cir 64000
    frame-relay mincir 32000

policy-map "name"
    shape average "cir" "bc" "be"
    shape adaptive "mincer"
map-class frame-relay "name"
    service-policy output "name"
frame-relay interface-dlci xxx
    class "name"

Frame-Relay Fragmentation

interface ser 0/0/0
    frame-relay fragment "fragment size" end-to-end

Frame-Relay DE
    frame-relay de-list 1 protocol ip gt 1500
    frame-relay de-list 1 protocol ip tcp "port 80"

interface ser 0/0/0
    frame-relay de-group 1 "dlci"

Frame-Relay Compression
    R1(config)#int S0/0.12
    R1(config­if)#frame­-relay payload­-compression packet-­by-­packet

    R1(config)#int S0/0.13
    R1(config­if)# frame­-relay map ip 10.1.13.3 103 Cisco payload­-compression packet­-by-­packet

    R1(config­if)#int S0/0.12
    R1(config­subif)#frame-­relay payload­compression frf9 stac
       R1(config­subif)#int S0/0.13
       R1(config­subif)#frame­-relay map ip 10.1.13.3 103 ietf payload­-compression frf9 stac

Frame-Relay Header Compression
    R1(config)#int S0/0.12
    R1(config­subif)#frame­relay ip tcp header­compression

       R1(config­subif)#int S0/0.13
       R1(config­subif)#frame­relay map ip 10.1.13.3 103 Cisco tcp header­compression active

      R2(config)#int S0/0.21
      R2(config­subif)#frame­relay ip tcp header­-compression passive
      R3(config)#int S0/0
      R3(config­if)#frame­relay map ip 10.1.13.1 301 Cisco tcp header­-compression passive









   

POS - Packet over SONET

Synchronous Optical Networking (SONET) and Synchronous Digital Hierarchy (SDH)

 

OC - Optical Carrier

 

SONET offers an additional basic unit of transmission, the STS-1 (Synchronous Transport Signal 1) or OC-1, operating at 51.84 Mbit/s—exactly one third of an STM-1/STS-3c/OC-3c carrier.

 

So (3) STS-1 circuits = 155 Meg.