network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
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Saturday, February 2, 2013

arp and hsrp...

this might be painfully obvious, but i thought interesting enough to note...

DLS1#clear arp-cach                                                            
DLS1#sh arp                                                                    
Protocol  Address          Age (min)  Hardware Addr   Type   Interface         
Internet               0   e89a.8f98.a703  ARPA   Vlan10            
Internet                -   0016.c706.96c2  ARPA   FastEthernet0/5   
Internet                0   0019.06e7.acc0  ARPA   FastEthernet0/5   
Internet              0   000f.8ffe.0980  ARPA   Vlan100           
Internet            -   0000.0c07.ac64  ARPA   Vlan100           
Internet            0   0016.479e.5fc1  ARPA   Vlan100           
Internet            -   0016.c706.96c1  ARPA   Vlan100           
Internet             -   0016.c706.96c6  ARPA   Vlan50            
Internet             -   0016.c706.96c4  ARPA   Vlan20            
Internet             -   0016.c706.96c5  ARPA   Vlan30            
Internet             -   0000.0c07.ac1e  ARPA   Vlan30            
Internet             -   0016.c706.96c3  ARPA   Vlan10            
Internet             -   0000.0c07.ac0a  ARPA   Vlan10 

of course we know in the arp output that the "-" means local... we also know that represents the virtual mac for hsrp...

the output is also telling us that dls1 is active for those three addresses, proven below...

DLS1#sh stand brie                                                             
                     P indicates configured to preempt.                        
Interface   Grp  Pri P State   Active          Standby         Virtual IP      
Vl10        10   110 P Active  local      
Vl20        20   100 P Standby     local      
Vl30        30   110 P Active  local      
Vl50        50   100 P Standby     local      
Vl100       100  110 P Active  local 

obvious is good too...

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