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Please clarify me!!!!!!!!!!!!!!!!

rageurdreams
Level 1
Level 1

Dear all,

interface FastEthernet0/0.150

encapsulation dot1Q 150

ip address 192.168.10.2 255.255.255.0

ip access-group 101 in

no ip redirects

no ip unreachables

no ip proxy-arp

no ip route-cache

no snmp trap link-status

standby 1 ip 192.168.10.1

standby 1 priority 105

standby 1 preempt

standby 1 track Serial0/0/0:0

standby 1 track Serial0/0/1:0

from above config. I understood, we configured router on-stick ( virtula interfaces to communicate between Vlans).

ip address 192.168.10.2 255.255.255.0 assigned ip address to virtual interface FastEthernet0/0.150,

please explain the following.....

<b><i>

ip access-group 101 in

no ip redirects

no ip unreachables

no ip proxy-arp

no ip route-cache

no snmp trap link-status

standby 1 ip 192.168.10.1

standby 1 priority 105

standby 1 preempt

standby 1 track Serial0/0/0:0

standby 1 track Serial0/0/1:0

</b></i>

thanks,

rageurdreams

2 Replies 2

bvsnarayana03
Level 5
Level 5

ip access-group 101 in - ACL 101 is configured inbound direction to the router.

no ip redirects - router sends pkt to another gateway which may be best path to destination, but icmp response not send to host.

no ip unreachables - Will not send any icmp unreachables messages to the host.

no ip proxy-arp - Multiple IP addresses are not mapped to a single MAC address (the router's MAC address), thus not doing ARP for routing to other subnets.

no ip route-cache - disables fast switching on interface.

no snmp trap link-status - will not track snmp logs for any changes on links.

All below commands are for HSRP +tracking set for serial interfaces.

standby 1 ip 192.168.10.1 -

standby 1 priority 105

standby 1 preempt

standby 1 track Serial0/0/0:0

standby 1 track Serial0/0/1:0

hope that clarifies.

pls rate all helpful posts.

Danilo Dy
VIP Alumni
VIP Alumni

Hi,

!

! Check you access-list 101 as it is used to filter incoming traffic

! to interface FastEthernet0/0.150

ip access-group 101 in

! Don't send redirects.

no ip redirects

! Don't send unreachables.

! NOTE WELL that this may break PMTU discovery.

! For example, if this router is edge for a VPN of any sort, you might need

! to enable ip unreachables

! A typical symptom is ping working but a larger transmission doesn't.

no ip unreachables

! Don't pretend to be something you're not.

no ip proxy-arp

! Disable high speed switching for IP routing

no ip route-cache

! Disable SNMP Trap signals from this interface (i.e. link status up/down)

no snmp trap link-status

! Following are HSRP entries for HSRP Group #1, Virtual IP is 192.168.10.1

standby 1 ip 192.168.10.1

! Priority of 105 means this router is the Active since default priority is 100

standby 1 priority 105

! The standby preempt interface configuration command allows the router to

! become the active router when its priority is higher than all other

! HSRP-configured routers in this Hot Standby group. The configurations of both

! routers include this command so that each router can be the standby router for

! the other router. The 1 indicates that this command applies to Hot Standby group 1.

! If you do not use the standby preempt command in the configuration for a router,

! that router cannot become the active router.

standby 1 preempt

! This tracks two interfaces, any one of them down will cause the HSRP to failover to

! standby router.

standby 1 track Serial0/0/0:0

standby 1 track Serial0/0/1:0

Regards,

Dandy

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