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Friday, November 14, 2008


let us say isp dint wanted to advertise the remote cust router as number .. it can be done like this

CODE
[Resuming connection 1 to isp ... ]

isp#

isp#config t
Enter configuration commands, one per line. End with CNTL/Z.
isp(config)#router bgp 300
isp(config-router)#neig 192.168.1.5 ?
activate Enable the Address Family for this Neighbor
advertise-map specify route-map for conditional advertisement
advertisement-interval Minimum interval between sending BGP routing updates
allowas-in Accept as-path with my AS present in it
capability Advertise capability to the peer
default-originate Originate default route to this neighbor
description Neighbor specific description
disable-connected-check One-hop away EBGP peer using loopback address
distribute-list Filter updates to/from this neighbor
dmzlink-bw Propagate the DMZ link bandwidth
ebgp-multihop Allow EBGP neighbors not on directly connected
networks
fall-over session fall on peer route lost
filter-list Establish BGP filters
inherit Inherit a template
local-as Specify a local-as number
maximum-prefix Maximum number of prefixes accepted from this peer
next-hop-self Disable the next hop calculation for this neighbor
next-hop-unchanged Propagate the iBGP paths's next hop unchanged for
this neighbor
password Set a password
peer-group Member of the peer-group
prefix-list Filter updates to/from this neighbor
remote-as Specify a BGP neighbor
remove-private-as Remove private AS number from outbound updates
route-map Apply route map to neighbor
route-reflector-client Configure a neighbor as Route Reflector client
send-community Send Community attribute to this neighbor
shutdown Administratively shut down this neighbor
soft-reconfiguration Per neighbor soft reconfiguration
timers BGP per neighbor timers
translate-update Translate Update to MBGP format
transport Transport options
ttl-security BGP ttl security check
unsuppress-map Route-map to selectively unsuppress suppressed
routes
update-source Source of routing updates
version Set the BGP version to match a neighbor
weight Set default weight for routes from this neighbor

isp(config-router)#neig 192.168.1.5 remove-private-as
isp(config-router)#do cibs
isp(config-router)#
as#2
[Resuming connection 2 to san ... ]

sanjose#sib
BGP table version is 9, local router ID is 201.0.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path
*> 201.0.0.0 0.0.0.0 0 32768 i
*> 202.0.0.0 192.168.1.6 0 0 300 i
*> 203.0.0.0 192.168.1.6 0 300 i -----------------------> no 65000


CODE
sanjose#ping 203.0.0.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 203.0.0.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
sanjose#ping
Protocol [ip]:
Target IP address: 203.0.0.1
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 201.0.0.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 203.0.0.1, timeout is 2 seconds:
Packet sent with a source address of 201.0.0.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/64/144 ms
sanjose#


the ping is still unclear for me , i will edit it after knowing the reasons as i have posted it in ccnp section

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