DELL S6000-ON User Manual

In Dell Networking OS, these origin codes appear as shown in the following example. The question mark 
(?) indicates an origin code of INCOMPLETE (shown in bold). The lower case letter (i) indicates an origin 
code of IGP (shown in bold).

Example of Viewing Origin Codes
Dell#show ip bgp

BGP table version is 0, local router ID is 10.101.15.13

Status codes: s suppressed, d damped, h history, * valid, > best

Path source: I - internal, a - aggregate, c - confed-external, r - 

redistributed, n - network

   Network     Next Hop     Metric  LocPrf  Weight  Path

*> 7.0.0.0/29  10.114.8.33  0       0       18508   ?

*> 7.0.0.0/30  10.114.8.33  0       0       18508   ?

*> 9.2.0.0/16  10.114.8.33  10      0       18508   701 i

AS Path

The AS path is the list of all ASs that all the prefixes listed in the update have passed through.

The local AS number is added by the BGP speaker when advertising to a eBGP neighbor.

NOTE: Any update that contains the AS path number 0 is valid.

The AS path is shown in the following example. The origin attribute is shown following the AS path 
information (shown in bold).

Example of Viewing AS Paths
Dell#show ip bgp paths

Total 30655 Paths

Address    Hash Refcount Metric Path

0x4014154  0    3       18508   701 3549 19421 i

0x4013914  0    3       18508   701 7018 14990 i

0x5166d6c  0    3       18508   209 4637 1221 9249 9249 i

0x5e62df4  0    2       18508   701 17302 i

0x3a1814c  0    26      18508   209 22291 i

0x567ea9c  0    75      18508   209 3356 2529 i

0x6cc1294  0    2       18508   209 1239 19265 i

0x6cc18d4  0    1       18508   701 2914 4713 17935 i

0x5982e44  0    162     18508   209 i

0x67d4a14  0    2       18508   701 19878 ?

0x559972c  0    31      18508   209 18756 i

0x59cd3b4  0    2       18508   209 7018 15227 i

0x7128114  0    10      18508   209 3356 13845 i

0x536a914  0    3       18508   209 701 6347 7781 i

0x2ffe884  0    1       18508   701 3561 9116 21350 i

Next Hop

The next hop is the IP address used to reach the advertising router.

For EBGP neighbors, the next-hop address is the IP address of the connection between the neighbors. 
For IBGP, the EBGP next-hop address is carried into the local AS. A next hop attribute is set when a BGP 
speaker advertises itself to another BGP speaker outside its local AS and when advertising routes within 
an AS. The next hop attribute also serves as a way to direct traffic to another BGP speaker, rather than 

174

Border Gateway Protocol IPv4 (BGPv4)