Sunday, April 16, 2006
Ping make and break. (Question #54)
Consider two routers connected to each other via their serial interfaces over frame relay with the following configs
Router R1
RouterR2
The two routers are able to ping each other. However on R1 (or R2) if you try to ping its own serial interface the ping fails.
1. Do whatever is necessary to be able get each router's attempts to ping its own serial interface succeed.
2. After having done (1) cause the pings on R1 to its own serial interface to now fail again but do so with making any changes to the configuration of R1 itself.
Router R1
interface Serial2
ip address 10.0.0.1 255.255.255.0
encapsulation frame-relay
no fair-queue
frame-relay map ip 10.0.0.2 122
frame-relay interface-dlci 122
no frame-relay inverse-arp
RouterR2
interface Serial2
ip address 10.0.0.2 255.255.255.0
encapsulation frame-relay
no fair-queue
frame-relay map ip 10.0.0.1 221
frame-relay interface-dlci 221
no frame-relay inverse-arp
The two routers are able to ping each other. However on R1 (or R2) if you try to ping its own serial interface the ping fails.
1. Do whatever is necessary to be able get each router's attempts to ping its own serial interface succeed.
2. After having done (1) cause the pings on R1 to its own serial interface to now fail again but do so with making any changes to the configuration of R1 itself.
Poetic inspiration.
The other day I was reading to my daughter and came across this Victor Hugo poem in her book
Be Like The Bird
by Victor Hugo
Be like the bird, who
Halting in his flight
On limb too slight
Feels it give way beneath him,
Yet sings
Knowing he hath wings.
That is a very nice poem. And it stayed with me after my daughter had already gone to sleep. Thinking about the poem, I felt it applied to a lot of things in life including the situation of preparing for the CCIE or CCNP or indeed any exam at all. I won't ruin the poem by trying to restate what it says so elegantly but do read and enjoy the poem and be inspired by it.
Coming to think of it, isn't an IOS configuration dump somewhat like a poem in its external appearance with it being left justified and with unequal lines? Maybe I should start a meme to see who can come up with a valid Cisco IOS configuration file that is also a poem? :)
by Victor Hugo
Be like the bird, who
Halting in his flight
On limb too slight
Feels it give way beneath him,
Yet sings
Knowing he hath wings.
That is a very nice poem. And it stayed with me after my daughter had already gone to sleep. Thinking about the poem, I felt it applied to a lot of things in life including the situation of preparing for the CCIE or CCNP or indeed any exam at all. I won't ruin the poem by trying to restate what it says so elegantly but do read and enjoy the poem and be inspired by it.
Coming to think of it, isn't an IOS configuration dump somewhat like a poem in its external appearance with it being left justified and with unequal lines? Maybe I should start a meme to see who can come up with a valid Cisco IOS configuration file that is also a poem? :)
