Archive for April, 2010

Set

Hi there, I am facing an issue when i am practicing in BGP aggregate-address with as-set.

In my scenario two routers are directly connected ( R3—-R1—-R2—–R4 ) ,R3& R1 are AS 1 R2 is AS 2 and R4 is AS3, when i am using the aggregate-address command (in R2) with all optional key words ,

if i use attribute-map to change the cost (metric) with the as-set keyword it is not working(cost is not changing in R1) , but if i remove the as-set the cost is applied to the aggregated route.

As per Cisco’s Doc as-set is Generates autonomous system set path information / to specify that the path advertised for route.

But here in my test it is not allowed to send the cost with as-set keyword.can anyone help me clear this.

Regards, Anbu

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Question regarding nexus 5K

Hi ,

I am configuring nexus 5K box. i logged it through console and gavev the ip 1.1.1.1 on on of its mgmt interface and gave 1.1.1.2 on my laptop and made a p2p link. the interface shows up-up on the nexus. Now I am able to ping nexus from my laptop but not vice versa. due to which i am not able to an IOS upgrade on nexus. any idea? its a new box fresh out of the box…

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CCIE SP Partner

I failed ccie sp lab and i will go soon again .I need partners. Pls Unicast me if you are interested

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WCCP and WAE question regarding high cpu utilization.

I’m using a nme-wae card in an ISR router and using wccp to redirect traffic, all traffic.

I notice that the CPU utilization gets to 100% and when I do a “show ip wccp” i notice CEF switched packets are zero and process switched packets are many, leading me to believe that’s the reason for high cpu…

Any suggestions on how to fix this?

Global WCCP information: Router information: Router Identifier: 192.168.133.21 Protocol Version: 2.0

Service Identifier: 61 Number of Service Group Clients: 1 Number of Service Group Routers: 1 Total Packets s/w Redirected: 141892759 Process: 141892759 CEF: 0 Service mode: Open Service Access-list: -none- Total Packets Dropped Closed: 0 Redirect Access-list: WAAS_PERMIT_ANY Total Packets Denied Redirect: 0 Total Packets Unassigned: 7881 Group Access-list: -none- Total Messages Denied to Group: 0 Total Authentication failures: 0 Total Bypassed Packets Received: 784

Service Identifier: 62 Number of Service Group Clients: 1 Number of Service Group Routers: 1 Total Packets s/w Redirected: 138317602 Process: 137859756 CEF: 457846 Service mode: Open Service Access-list: -none- Total Packets Dropped Closed: 0 Redirect Access-list: WAAS_PERMIT_ANY Total Packets Denied Redirect: 168333787 Total Packets Unassigned: 9094 Group Access-list: -none- Total Messages Denied to Group: 0 Total Authentication failures: 0 Total Bypassed Packets Received: 732

! interface FastEthernet0/0 ip address 192.168.70.161 255.255.255.252 secondary ip address 10.160.1.3 255.255.255.0 ip wccp 61 redirect in ip pim sparse-dense-mode ip cgmp duplex full speed 100 standby 1 ip 10.160.1.2 standby 1 timers 5 15 standby 1 priority 105 standby 1 preempt standby 1 track Multilink1 end

interface Multilink1 description bandwidth 4096

ip wccp 62 redirect in ip flow ingress ip flow egress no peer neighbor-route ppp chap hostname abc ppp multilink ppp multilink links minimum 1 ppp multilink group 1 ppp multilink fragment disable service-policy output QOS end

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Live From The Field

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OSPF SPF timer and interface dampening

There is an interface that is constantly flapping. I would like to configure dampenning in that interface in a way to avoid SPF calculations. Could someone please provide the correct dampening configuration to accomplish that and why? (half, resuse, suppress limit, max time, etc).

Thanks a lot for your help,

chris

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Lab Traffic Generator ?

Hi, it is nice to be able to generate traffic to test smth from time to time. I used to use tfgen.exe, a small app that can send udp packets to a destination with some easy control for BW. Sadly, it backfires on w2k3 server.

I know of many ways to generate traffic, but most are involved. Nice for detailed type of traffic, but cumbersome for the quick test.

Anybody has a quick and easy like tfgen ? Ideal app would be windows based, select udp dest port, BW, fire!

TIA, -Carlos

Policing, time-range.

Assume the task:

Make sure that http and ftp traffic on int f0/0 is policed to 10 Mbps on weekdays from 9am to 5 pm. Conforming traffic should be transmitted and exceeding dropped.

I need your comment if my solution is OK? If both are OK is one preferred?

========== WORKBOOK SOLUTION: ==========

time-range WEEKDAYS periodic weekdays 9:00 to 17:00

access-list 100 permit tcp any any eq www time-range WEEKDAYS access-list 100 permit tcp any any eq ftp time-range WEEKDAYS

class-map match-all CLASS match access-group 100

policy-map POLICY class CLASS police 10000000 conform-action transmit exceed-action drop

interface FastEthernet0/0 service-policy output POLICY

========== MY SOLUTION: ==========

ip cef

time-range WEEKDAYS periodic weekdays 9:00 to 17:00

access-list 100 permit ip any any time-range WEEKDAYS

class-map match-any PROTOCOLS match protocol http match protocol ftp

class-map match-all QOS match access-group 100 match class-map PROTOCOLS

policy-map POLICY class QOS police 10000000 conform-action transmit exceed-action drop

interface FastEthernet0/0 service-policy output POLICY

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Actual and Compounded Debt Example

Experts, I have two points on the explanation and the following example: http://cisco.com/en/US/docs/ios/qos/configuration/guide/polcing_shping_oview_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1001013

1) There should be a way for the flow to pay back the actual debit in case, for instance, that no packet come in for a series of timeslots; this is not mentioned. How does it happen?

2) tokens are refurnished at every timeslot even if the packet is dropped. So, on my opinion, at time 5, when the packet is dropped, 1 token should go in the bucket. Then at time 6 another token should be put in the bucket, making 2 tokens in the bucket; so when the 2 data units arrive they can be transmitted without borrowing. In the example it looks like the token from timeslot 5 is lost! Any idea, I am missing something?

Thanks, Bit.

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Cisco Live

Hello All: So who is planning to be at Cisco Live?

Now is the time for all of you to make sure you are following your vendors on twitter, blogs and facebook. They will normally offer some great items ( specials, giveaways, etc. ) before, during and after Cisco Live.

Don’t miss out on the deals and the fun!!!!

Thanks, Larry Hadrava CCIE#12203 Technical Support Engineer Email: Larry@ccbootcamp.com

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