When I Issue show adjacency on my 6509 I get following output.
IP Vlan104 172.19.104.163(7)
IP Vlan104 172.19.104.164(7)
IP Vlan104 172.19.104.165(7)
IP Vlan105 172.19.105.24(7)
IP Vlan105 172.19.105.26(7)
IP Vlan105 172.19.105.27(7)
IP Vlan105 172.19.105.28(7)
What does (7) signifies?
172.19.104.163(7) :- IP address of the next-hop interface. The value in parenthesis refers to the "refCount" or the number of times that this adjacency is pointed to by FIB entries. The same value appears later in the entry.
The number of references to the adjacency that are currently stored in the router's memory. There is one for each corresponding entry in the CEF table, plus a few others for a variety of reasons (such as one for the code that performs the show adjacency command).
*Plz rate all usefull posts.
Will u plz help me to understand how FIB and Adj table work together.
I don't see the layer 2 mapping of next hop in show adjacency
Let me give it a try:
Protocol Interface Address
IP GigabitEthernet5/2 10.104.149.1(7)
IP Vlan10 10.10.10.2(10)
C6K1#sh ip arp 10.10.10.2
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.10.10.2 16 0026.9809.7dc1 ARPA Vlan10
C6K1#sh mac address-table address 0026.9809.7dc1
Legend: * - primary entry
age - seconds since last seen
n/a - not available
vlan mac address type learn age ports
* 201 0026.9809.7dc1 dynamic Yes 0 Po100
* 10 0026.9809.7dc1 dynamic Yes 0 Po100
* 50 0026.9809.7dc1 dynamic Yes 0 Gi4/6 >>> Mac address and port is seen here.
* 1 0026.9809.7dc1 dynamic Yes 0 Gi4/6
Inayath and Mitesh,
I apologize if this looks like an advertisement (well... perhaps it is ;) ). You may also check the Chapter 6 from the new CCIE Official Certification Guide v5.0, Volume 1, available in this PDF as a sample content from the book:
I wrote that chapter, and I've gone to great lengths there to explain how the entire CEF with the FIB and ADJDB play together.
Amazing Peter ,
I didnt know about this book I will go through it today and tommorow.
I would appriciate if you can share any book in depth on STP and multicast as I would like to go indepth on the same.
Regarding STP, Chapter 3 in the same book (CCIE Official Certification Guide v5.0, Volume 1) covers STP extensively. I have incorporated several experiences from issues here on CSC into that chapter.
Multicast routing will be covered in the Volume 2 of the book written by Narbik Kocharians and Terry Vinson that should be available during October. Apart from that, however, I was personally very satisfied with a Cisco-authored training material about IP Multicast that was formerly available on an FTP server at ftp-eng.cisco.com. This FTP server has recently been brought down - I do not know if it still runs internally in Cisco. I have mirrored the contents, however, so if the server does not run anymore, let me know - I will post the slide decks somewhere.
The (7) is not really interesting to you. Documentation says that this is the count of internal references pointing to this particular entry. It has been my experience that this number is always higher than the number of routing table entries resolving to this particular adjacency table entry. There are obviously another internal references to each adjacency table entry - this is really of interest only to IOS developers and Cisco specialists
In short - do not worry too much about it. What is more interesting is the show adjacency detail output that provides data that are more relevant to your device's operation.