Cisco Nexus 1000-V

Some good links to get started with Nexus 1000-V

Is Cisco selling a new car? Or what is the Cisco Nexus 7000?

How will the Cisco Nexus 1000V change your job role?

Cisco taking greater investment in VMware - both with cash and Nexus

VIDEO: Cisco Nexus 1000-V

TCP MSS Adjustment

It was a bit puzzling at first since you could ping these sites but could not access them via a web browser. The problem was the MTU setting.

The soultion was to use specify the MTU setting on each interface.

ip mtu 1492
ip tcp adjust-mss 1452

If you were wondering what ip tcp adjust-mss 1452 does it modifies the maximum segment size (MSS) for TCP SYN packets traveling through the interface (see link below for more information).

TCP MSS Adjustment
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ft_admss.html

Routes Preference - OSPF

Intra-area routes are preferred over inter-area or external routes regardless of their cost; see Section 16.2 paragraph (6) of the OSPF RFC.

Inter-area routes are preferred over external routes; see Section 16.2 paragraph (5) of the OSPF RFC.

E1 routes are preferred over E2 routes; see Section 16.4 paragraph (6) of the OSPF RFC.

When comparing E1 routes, the route metric is the external cost added to the internal cost; see Section 16.4 paragraph (6.d) of the OSPF RFC.

The internal cost of an E1/E2 route is the cost between the current router and the forwarding address specified in the Type-5 LSA (or originating ASBR if the forwarding address is set to 0.0.0.0); see Section 16.4 paragraph (3) of the OSPF RFC.

When comparing E2 routes, only the external costs are compared; see Section 16.4 paragraph (6.b) of the OSPF RFC.

If multiple E2 routes have the same external cost, the internal cost (as above) is compared; see Section 16.4 paragraph (6.d) of the OSPF RFC.

Cisco subnet's top 10 Cisco stories of 2008

These were the top 10 Cisco stories as per the Cisco Subnet blog

10. Close to tears at Cisco's shareholder meeting

9. Linksys customer service number offers a different kind of 'service'

8. The cold evidence of Cisco's hiring freeze

7. Cisco puts CCIE learning on the fast-track

6. Cisco warns of flaws in Cisco ASA 5500, PIX, Cisco Secure ACS

5. Cisco issues 11 security alerts for IOS, plus one for Cisco Unified Communications Manager

4. Video: Out goes Cisco, in comes ShoreTel VoIP for the City of Oakland

3. BusinessWeek: Fake Cisco gear could be used to spy on the U.S.

2. Cisco cuts jobs in Richardson, Texas

1. 20 useful sites for Cisco networking professionals

This is certainly a very nice list to remember what were the major happenings with Cisco in 2008.