CSS 11503 Moving Circuit/Vlan to GBIC for GB speed

Answered Question
Aug 4th, 2010
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Hello


At our Datacenter, we are looking to bring in a GB circuit from the ISP to give us GB throughput across the entire network.  The only sticking point is the CSS.  Right now all connections are made using the Fast Ethernet ports.  Is it possible to turn up a Gig ports on the management card and use it to relocate an already existing circuit/vlan?  Using the GBIC, I want to connect over fiber to a Cisco 3750 switch.  Is this possible?


Thanks

Correct Answer by yushimaz about 6 years 11 months ago

You can enable gig ports on SCM but user traffic may stop for several tens of seconds.

I confirmed the behavior with my lab devices.


--- interface config on CSS


interface  1/1

  admin-shutdown

  bridge vlan 774


interface  1/2

  admin-shutdown

  bridge vlan 775


interface  2/1

  bridge vlan 774


interface  2/2

  bridge vlan 775

---


When I enabled (issued no admin-shut) at interface 1/1 and 1/2, bridge forwarding table

was purged and all services went down.

After several tens of seconds, all client and server mac address were listed on bridge

forwarding table and all services went alive. (Console log of my test is attached.)


---


CSS11503-A# show bridge forwarding

VLAN     MAC Address          Port Number

-----    -----------          -----------

VLAN774  00-1d-45-26-87-17     2/1

VLAN775  00-0c-29-21-d7-62     2/2

          00-0c-29-2f-15-7b     2/2

          00-1d-45-26-87-18     2/2

          00-0c-29-68-3e-de     2/2


CSS11503-A# show service summary

Service Name                     State     Conn  Weight  Avg   State

                                                         Load  Transitions

sv1                              Alive         0      1     2           34

sv2                              Alive         0      1     2           32

sv3                              Alive         1      1     2           38


CSS11503-A# conf t

CSS11503-A(config)# int 1/1

CSS11503-A(config-if[ 1/1])# no admin-shutdown

CSS11503-A(config-if[ 1/1])# int 1/2

CSS11503-A(config-if[ 1/2])# no admin-shutdown

CSS11503-A(config-if[ 1/2])#

CSS11503-A# show service summary

Service Name                     State     Conn  Weight  Avg   State

                                                         Load  Transitions

sv1                              Down          0      1   255           35

sv2                              Down          0      1   255           33

sv3                              Alive         0      1     2           40


CSS11503-A# show bridge forwarding

VLAN     MAC Address          Port Number

-----    -----------          -----------

VLAN774  00-0c-29-56-32-91     1/1

          00-1d-45-26-87-17     2/1

VLAN775  00-0c-29-21-d7-62     1/2

---



I mean that you can connect between cat3750 and CSS with GBIC and fiber cable.

However, communication failure may occur during this operation. (Maintenance window

wil be needed.)

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Correct Answer
yushimaz Mon, 08/09/2010 - 01:10
User Badges:
  • Cisco Employee,

You can enable gig ports on SCM but user traffic may stop for several tens of seconds.

I confirmed the behavior with my lab devices.


--- interface config on CSS


interface  1/1

  admin-shutdown

  bridge vlan 774


interface  1/2

  admin-shutdown

  bridge vlan 775


interface  2/1

  bridge vlan 774


interface  2/2

  bridge vlan 775

---


When I enabled (issued no admin-shut) at interface 1/1 and 1/2, bridge forwarding table

was purged and all services went down.

After several tens of seconds, all client and server mac address were listed on bridge

forwarding table and all services went alive. (Console log of my test is attached.)


---


CSS11503-A# show bridge forwarding

VLAN     MAC Address          Port Number

-----    -----------          -----------

VLAN774  00-1d-45-26-87-17     2/1

VLAN775  00-0c-29-21-d7-62     2/2

          00-0c-29-2f-15-7b     2/2

          00-1d-45-26-87-18     2/2

          00-0c-29-68-3e-de     2/2


CSS11503-A# show service summary

Service Name                     State     Conn  Weight  Avg   State

                                                         Load  Transitions

sv1                              Alive         0      1     2           34

sv2                              Alive         0      1     2           32

sv3                              Alive         1      1     2           38


CSS11503-A# conf t

CSS11503-A(config)# int 1/1

CSS11503-A(config-if[ 1/1])# no admin-shutdown

CSS11503-A(config-if[ 1/1])# int 1/2

CSS11503-A(config-if[ 1/2])# no admin-shutdown

CSS11503-A(config-if[ 1/2])#

CSS11503-A# show service summary

Service Name                     State     Conn  Weight  Avg   State

                                                         Load  Transitions

sv1                              Down          0      1   255           35

sv2                              Down          0      1   255           33

sv3                              Alive         0      1     2           40


CSS11503-A# show bridge forwarding

VLAN     MAC Address          Port Number

-----    -----------          -----------

VLAN774  00-0c-29-56-32-91     1/1

          00-1d-45-26-87-17     2/1

VLAN775  00-0c-29-21-d7-62     1/2

---



I mean that you can connect between cat3750 and CSS with GBIC and fiber cable.

However, communication failure may occur during this operation. (Maintenance window

wil be needed.)

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