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Problem with 7304

Unanswered Question
Jan 12th, 2007
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In my router 7304 the command 'show diag' represents next results (part of output):

...

TLB entries : 58

Virt Address range Phy Address range Attributes

0x12000000:0x13FFFFFF 0x012000000:0x013FFFFFF CacheMode=2, RW, Valid

0x14000000:0x15FFFFFF 0x014000000:0x015FFFFFF CacheMode=2, RW, Valid

0x16000000:0x17FFFFFF 0x016000000:0x017FFFFFF CacheMode=2, RW, Invalid

0x18000000:0x19FFFFFF 0x018000000:0x019FFFFFF CacheMode=2, RW, Invalid

0xC6000000:0xC7FFFFFF 0x046000000:0x047FFFFFF CacheMode=2, RW, Valid

0xC2000000:0xC3FFFFFF 0x042000000:0x043FFFFFF CacheMode=2, RW, Valid

0xDC010000:0xDC011FFF

...


The work of this device is not very stable. What this messages (CacheMode=2, RW, Invalid) means? Is it hardware or software problem?


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Overall Rating: 5 (2 ratings)
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David Stanford Fri, 01/12/2007 - 07:05
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  • Cisco Employee,

These are TLB entries and TLB stands for "Translation Lookaside Buffer".

It's a table of relation of Virtual

Address range and Physical Address range that RISC processor uses.


"Invalid" in TLB entries does NOT indicate HW/SW failure. That indicate an address

region that CPU doesn't use.


In this case, "Invalid" address region are defined as follows.


TLB entries : 58

Virt Address range Phy Address range Attributes

0x12000000:0x13FFFFFF 0x012000000:0x013FFFFFF CacheMode=2, RW, Valid

0x14000000:0x15FFFFFF 0x014000000:0x015FFFFFF CacheMode=2, RW, Valid

0x16000000:0x17FFFFFF 0x016000000:0x017FFFFFF CacheMode=2, RW, Invalid

0x18000000:0x19FFFFFF 0x018000000:0x019FFFFFF CacheMode=2, RW, Invalid

0xC6000000:0xC7FFFFFF 0x046000000:0x047FFFFFF CacheMode=2, RW, Valid

0xC2000000:0xC3FFFFFF 0x042000000:0x043FFFFFF CacheMode=2, RW, Valid

0xDC010000:0xDC011FFF



This is no problem.


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